Post mean pranks here.

[adc90]

Replace someones shampoo with nair.

[Ad Bot]

[TapeDeck]

jello in the toilet?

[Zaie]

Replace someones shampoo with nair.

Whats nair

[Thirsty]

Tell old people that they won't be getting any social security because of a new law.

[Otis Da HousKat]

Whats nair

Hair remover.

[TapeDeck]

Whats nair

http://en.wikipedia.org/wiki/Nair_(hair_removal)

EDIT: Damn you, Otis.

[Tannrar]

poop

[Thirsty]

Put anit-freeze in someone's jello, it's hilarious. (Not really, it's a tastless poison that kills very quickly)

[Sarge]

put clear plastic wrap across the toilet hole, under the seat

make your toilet seat really cold

subscribe someone to gay pr0nz

if the windows are locked in a car, fart a smelly fart

warm glass of water + someone's sleeping hand = piss-o-rama

[IcyGamma]

piss-o-rama

Nice 

This isn't so much a prank, but I often pretend to sneeze over peoples food at the dinner table. Good times.

[Jaymz]

If someone gives you a slight push fall over and pretend to have broken something. I'm pretty good at it :D

[jirue]

make a folder named something on your friends computer.  I don't care what you name it, as long as they are attracted to it.

Take a picture of the screen, and save that as the desktop. delete the folder.  Bam you have an unclickable folder.

[Builder]

If you go to a friends house and your staying there for the night this one is merely harmless and fun. Go to there bathroom on the top of the toilet that big cement part pull it off and for some of you who don't know try pulling it off tonight it weights like ten pounds not to heavy. Anyway once its off you see some stuff in there like a little cap and crap just piss in it or put food coloring then the next time someone flushes it instead of clean water (enter substance here) comes out.

[NickTheSushi]

If you go to a friends house and your staying there for the night this one is merely harmless and fun. Go to there bathroom on the top of the toilet that big cement part pull it off and for some of you who don't know try pulling it off tonight it weights like ten pounds not to heavy. Anyway once its off you see some stuff in there like a little cap and crap just piss in it or put food coloring then the next time someone flushes it instead of clean water (enter substance here) comes out.

Will try in my own bathroom.

Anyway, I learned how to make a home-made 15-minute-lasting smoke bomb (I think it's that long) on youtube. I'm going to make a few of them, hide them around a door, attach fishing line from the doorknob to all the nade keys.

Door opens, smoked out. :3

[Riot]

get 10 brownies put them together, mash it into a huge looking log poo, then put in sink at school. people have funny reactions.  Or get smoothie if ur school has one, mix it with chocolate milk, get mayo, ketchup, mustard. then mix it all up, and spill it in the toilet sink, leave a trail running from the door to the sink looking like some kid threw up running to the sink. I don't know if its funny but their reactions are hilarious.