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8.
Function: noun. Gamma is used to describe the ability some women have to attract men with practically no effort. Much like the Hulk in the comics absorbed gamma rays from a gamma bomb that transformed him into a raging monster, this woman enters a bar and absorbs all the attention of the men in the bar, transforming her into the trophy of the night. Any guy who leaves with her has conquered the beast and deserves the respect of all other men.
Damn, did you see that chick who walked into the bar. Every guy has been hitting on her; her gamma is unreal!
by Daily Dose April 11, 2007
 
9.
The abreviated colloquial form of "get out of my"
I said - Gamma Face!
by briary August 12, 2006
 
10.
Date rape drugs, sometimes taken by people in college who can't sleep
dangerous if mixed with alcohol
"Alan is crazy man! he took 4 doses of gamma and threw up like crazy"
by lad March 18, 2003
 
11.
a young white person (offen middle class) who dress's and talks like a urban street black man in a over the top manner, they try so hard that they irratate everyone.
what a stupid fucking gamma
by grumpyboy September 13, 2005
 
12.
Women who will only have a relationship with black men
She is a gamma
by Dawson July 15, 2003