Brad and Chad were wrestling with their shirts off on the frat's front lawn, bro homo.
The act of, or a gay male who, pretends to be straight and a 'bro' around his straight male friends who don't know the 'brohomo' is gay so the 'brohomo' can do acts of gayness to them.
Adjective form is 'brohomosexual'
Jackson: "You know he's gay, right?"
Luke: "AWW F-... what a brohomo man!"
Bro B: "...you watched me?"
Bro A: Brohomo man.