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1.
A sexual encounter between two men, who are bros, either by blood or by fist bump; kind of like an Eiffel tower.....Only gayer
Bro 1: Dude I was so drunk last night I got into a bro handle.
Bro 2: Thats fucked up

"Bro, we were so lasted last night....did we get into a Bro Handle??"
by Strehlowlikesguys February 03, 2010
 
2.
A friend, acquaintance, or random beez; often used as a term of address.
What's goin' on, brohandle?
by A Salamander. January 31, 2008