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1.
a congratulatory remark used to recognize a friend's "bro"-like behavior; derivate of "that a boy"
Friend 1: DUDE, i have such a tanktop tan right now.
Friend 2: DUDE, i haven't worn a shirt in 3 days.
Friend 1: That a bro.
Fist pound
by gosports123 June 14, 2011