In the context of games in which virtual ownership of virtual items is possible, clean refers to an item which is undamaged or unused. In the context of Diablo 2 for example, it means that the item has not been socketed or personalized. (in D2, when used in conjunction with "socket" it means that the socket has not been encrusted with a gem or rune or jewel)

Neo-French (see neo-france) slang for masturbation.

Without any tatoos or body piercings, except maybe for pierced ears.

Bringing back a friends girlfriend without any disieses. (if none were confirmed before the tranfering of girlfriends)

the state you are in when you are being drug tested

A person or thing that is any or all of the following: retarding, stupid, annoying, emo, gothic, a bitch, a fucker, dumb, sucks, or pretty much anything that is bad and used to describe someone that you hate.

the drug lean / codeine