The forbidden grade that you receive when you know you are a fukking idiot and didn't revise or even listen to anything or anyone and probably have been adopted by a bunch of nonces

An text based emoticon that is almost the same as :/ but with a little more disgruntled flavor.

An ounce of marijuana

To sleep. I'm not sure of how many ways to use it though.
If you were sleeping you wouldn't be "z'ing."
The only way I know how, or have heard anyone use it is in the example.

1. The AIM smiley expression of a guy after jacking off. When one's tired/exhausted.
2. An AIM smiley expression that can replace '=X'.
3. An AIM smiley expression just shows expression.
4. Removes emphasis in a sentence.

1. to question sleep
2. insomnia

A letter that was pretty awesome long ago, until that bastard X stole our pronunciation.