look up any word, like the eiffel tower:
 
1.
To make a fight unfair by recruiting all of your friends ({bro}'s), thereby outnumbering the non-bro.
"This dude spilled beer on my new shirt, I'm gonna call up 10 of my buddies and bro stomp his ass"
by JDub3350 September 29, 2011
 
2.
to beat someone for shitting on a fellow bro. Most always ends in death.
i dont care if you are 10 years old, i'll bro stomp the fuck outta you, you've lived long enough
by Hachi'sRevenge June 04, 2010