X
1. Xzibit.
2. Most common letter to use as a variable.
3. Ecstacy
4. Extreme
1. "Let's listen to sum X."
2. "2x + 5x = 7x"
3. "Are you on X?"
4. "I'm going in the BMX comp at this months X-Games."
by Im-port August 27, 2003
X
target
"There goes the x right there.", one might say upon catchin' some foo, hater, bitch boy, richie, enemy, etc., slippin'.
by Silent Ninja c1998 July 15, 2003
X
blue and yellow purple pills
I took some X so I can roll away like a rollerblade, till my eyes roll back in my skull for days.
by TheBynumProject August 13, 2008
X
Universally used to represent the unknown, ranging from variables in mathematic equations to personality profiling. The uses of X can be traced back to Greek and Roman math.
"14x+(41/3x/x)*7 = 3.14159"
"The patient in question has an X personality, or one that cannot be categorized."
by Shadowrunner July 16, 2004
X
X is often the symbol written across the hand of someone who is under 21 in a bar, as an alert to the bartender that that person may not drink alcohol.

Also used by straight edge kids who show their devotion to the straight edge way by drawing Xs across their hands, when not in bars.
Example not available for this definition.
by Rouxbijou August 09, 2004
X
Short for Extreme
Skater :'Whoa! that kickflip across the roof was x!'
by Evil-Ernie June 06, 2003

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