backup phrase used to question someones reaction to a certion situation...
Boy: YEEEEEEEEEEEE! DAMNN SON! That car left spinner is goin backwards!!!

Girl: So you mad?
by liljesus January 8, 2009
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also, s.y.m.

something you say to a hater .
alex: 'damn son u always chill w. nita . she looks soo good .'

justin: 'so you mad ?'

jd: 'shit, how much were those kicks ?'

bobby: '170 .'

jd: 'why are you trying to show off ?'

bobby: 'so you mad ?'
by justinro8inson September 27, 2009
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