Jeff Wong's definitions
A term used for people who do not use higher levels of thinking, ergo reference their penis when making decisions.
Guy1:Man I want to smack up that bitch
Guy2:You some kind of Brainstem? fool...
Holy shit, stop humping my leg you Brainstem
Guy2:You some kind of Brainstem? fool...
Holy shit, stop humping my leg you Brainstem
by Jeff Wong January 11, 2009
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