The phenomenon of too many dudes hanging out at a social gathering, especially one in which alcohol is consumed in large quantities, without the presense of any chicks; drunk dudes at a sausagefest who start to blurr the lines between just being a "bro" and taking it a borderline homosexual level that starts to get weird
Mark: Dude, were you at Joe's party last weekend?

Neil: Yeah man. It was just Joe and all his weird friends from high school. They were starting to get a little bromiscuous man.

Mark: Like what?

Neil: It started out with some beer pong victory dance they were doing... and then Garrett licked Joe's nipple

Mark: ... thats pretty bromiscuous
by PatchesMcBalls December 09, 2010
an adjective that can only be defined as chilling with too many dudes all the time, not as much female interaction in ones life
Bro 1~"Dude, why does this random chick always follow us around and come to all of our parties? We don't even know her!"

Bro 2~"Man, she's bromiscuous"
by BromiscuousJoey June 16, 2010
To be involved in or engage in numerous relationships with male friends; to cultivate several bromances
He was bromiscuous with several of guys from his gaming group.
by ryanrocks April 06, 2009
hangs out with a fairly broad range of groups, not committing to any particular group of friends.
Byron: Yo, is Mark coming over?

Chris: Nah, man, he's bromiscuous, probably kicking it with some other random group.
by ChristB March 25, 2010

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