fhqwgads - The next 5 times people try to target you, the response will randomly be one of the following:
Fahorglingrads? Spit out the sandwich and say it, with a flourish!
(rearranged letters of your name here) suuure isn't here as far as I can see.
Pardon me while I insult your spelling and grammar.
I see nobody here by that name. Perhaps you meant Fhqwgads?
DELETED!!

requireprecision - All pentagrams and circles will take two minutes to create before their effects will be noticed. If someone tries to do anything while raising a pentagram or circle, they will see:
(Pentagram) You are too busy calculating the precise angles of the points of your pentagram to do that. Now, where's my protractor?
(Circle) You are too busy carefully measuring the radius of your circle to do that. Now, where's your compass?

bananapeel - Everyone in the realms becomes prone and loses balance for five seconds.

AllYourSpamAreBelongToUs - Listen to every channel in the realm simultaneously.

systemfailure - All players' triggers are disabled.

blackmage4ever - Allows you to 'Hadoken ', causing massive nonelemental magic damage. Only works once per Lusternian day.

racialtensionrising - Every online member of a randomly selected race is killed.

f'aiglomdoring - Raises Crow.

blink - Kills Furloch.

becauseimfain - Allows you to City Favour an extra time that month

*cackle* Closed Beta.. good times.

über necro...

sorry, but when Milk is spilled from teh noses I just can't help but post

Since it's already been unearthed...

idliketobuytheworldacoke - Promotes Peace, Happiness, and Drunkeness throughout the realms by spawning a bottle of Untimely Demise Moonshine in the inventories of all active players.

Since Corinthian went and necroed the thread...

Well, a few more suggestions couldn't possibly hurt.

todayisagooddaytodie: Puts ten cows in your entourage and teleports you to Terentia's fulcrux.
stpatricksday: Maxes out the entire Basin's drunkeness levels.
iseedeadpeople: Self-inflicts the "haunted by ghosts" Divine punishment.
distancelearningprogram: Unlocks all skillsets and specializations.
mastersdegree: Transcends all skills.
justifiablehomicide: Removes all forms of grace from a target.
takeawalk: Teleports someone to a random Astral Sphere.

oldswitcheroo - turns every celestine to magnagoran, magnagoran to celestine, serenwilde to glomdoring and glomdoring to serenwilde

lightofcelest - forces the background color and text color to change into white (may force player to go blind by the brightness of the screen)

toppledown (position) - hate your leader? champion? GM, GA etc? No problem! This will remove them from the position and you'll be temporary take seat in that position for a good IC day.

raiders - when in an enemy plane, typing this cheat will distort the nexus, rifts and (thank estarra) cubix for a good duration of IC day. Go raid like crazy!

cuuuubiiiiiix - instant cubix at your service

youcantseeme - you won't be seen in WHO, CLWHO, QW, CWHO, GWHO, OWHO and in the room (good for a bit of privacy)

favouritism - forces all the divine to truefavour you for a good Lusternian Month

helpless (name) - forces the target to not do anything as if he's AFK

allyourartiesarebelongtous - get 1 of every available artifact in the game

traderbob - destroys all shops in the realms and changes ownership to the cheater

ihaveeverything (shop) - targetted shop will have all the available and unlimited items being sold at a credits (not gold)

huntinggrounds - someone got here first? no problem, this cheat will force everyone except you in that area to bail off and blocks anyone else except you from entering. Ahh now you can hunt in peace

EDIT

Useless cheat:
Newbies - resets the entire game so everyone will start at level 1

I love this thread. Thanks, necroman.

mrburns - Spawns 100,000 gold in your inventory.
belikerichter - Spawns 10,000,000 gold in your inventory.
qa'plah - Removes the cap on your enemy list and enemies everyone not in your city/commune.
lordoftheland - Removes the cap on demesne size.
irs - All money in the inventory of every online player is given to you.
helphelpimbeingrepressed - Become a loyal mob of your city; anyone who hits you is auto-enemied.
isweariwontsexuallyharassnejiiagain - Become Tae'dae.
bygrabtharshammer - All online Celestians shout a random Star Trek reference and all online Magnagorans shout a random Star Wars reference.
entaruadun - Mobs make Starcraft references instead of Monty Python references.
entarotassadar - A random mob shouts a random Starcraft quote.
jaffakree - Teleports all Magnagorans from any uninfluenced villages to the Megalith.
thereisnospoon - Gain trans telekinesis.
thesearenotthedroidsyourelookingfor - Gain trans telepathy.
waveadeadchicken - Gain trans vodun.
slicendice - Gain trans blademaster.
waterytart - If you're female, gain trans aquamancy; if you're male, gain the most overpowered pre-nerf sword currently in existence.
smurphette - Switch genders.

EDIT: More. I'm bored.

hulkcrush - Gain trans bonecrusher.
belikepam - Changes your description to a randomly generated one involving 'curvacious hips' and a 'generous bosom', changes your gender to female, and sets your race to Siren.
csi - Permanent deathsight.
nerfcityleaders - Undo the last city disfavour.
howmuchwoodwouldawoodchuckchuckifawoodchuckcouldchuckwood? - Gain a staff of *ZOT*.
callcousinvinnie - Bob is replaced by a mob that undersells everything.
resistanceisfutile - Become capable of forcing people to join your guild or city.
rpcoach - Become capable of docking people's rolepoints.
thisisnotachaea - Instantly kills everyone below max rolepoints.
wearenotrajamala - Become aslaran.
slimeyfrog - Become mugwump.
mommywasawillowisp - Become a faeling.
iwannagetstoned - Become dracnari. Also spawns 1000 weed in your inventory.
oneeyedmonster - Become krokani.
bighairyfreak - Become igasho.
teaearlgreyhot - Allows cooks to brew non-alcoholic tea.

Holy crud. Talk about topic necroing.

That kind of thing happens when I'm bored.

wearenttainted! - makes all members of Celest and Serenwilde shout and say over all channels "Glomdoring is not Tainted!"

damnitwherediditgo? -lose something? something precious decay? Well, instantly get it back and it will never decay or get lost now!

shitshtitwhotheforkishotingus? -Does massive damage to raiders on any plane associated with your city/commune. doesn't work with astral.

toodamnhard -astral getting you a bit down? Well, down grade all the mobs, including linked and kill them easly! All mobs drop 1k+ gold.

we'regoingtodie!! -instantly implode your aethership

got100k? -makes you an aethership with 100 power and lots of armour but moves like a hummingbird!

deadperson -been losing those damn sea wars of late? well, automaticaclly raise Ladintine! Kills all celestines as well. Or Raises Marliythn and kills all Mags.

|337sp34|< -woot! |337! makes everyone speak |337 over all channels, shouts, and tells. Divine too!

letsplayagame -makes you Hajmin til you log out! You get all of his powers and guess what! His spear too!

iamtheboozemaster-Gives Arix control of the Basin's booze market
secretblendofherbsandspices-gives Arix access to all recipes, even private ones
zomgnerfarix-doesn't actually do anything, but someone will try it anyway

bahtofaethorn - instantly kills all three avatars of both Moon and Night and their champions, sets Faethorn's loyalty to the bunny, and enemies all wiccans to the bunny

cosmicglitch - if done on Nil, gathers the demon lords together in a circle where they sing happy songs, smoke weed, and pass out flowers to all visitors ... makes all Magnagorans peaced for an IC day. if done on Celestia, sets the supernals against one another and a brawl ensues ... the survivor heads down to Prime and instakills all Celestians.

griefer