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1.
Noun - is an exercise machine designed for the Bro anatomy. specifically works the chode muscle
"Hey bro, I'm going to the gym. Wanna come?"

"Nah bro, I'm good. I got a Broflex at home".
by wijiwang July 10, 2008
 
2.
The act of flexin on ur Bros and homies
"why B always BroFlex on us when he get that henny in him?"
by MATEO THA MONSTER September 14, 2011