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1.
a complex intimate relationship between two men of any sexuality, abolishing any divisions between brotherhood and companionship.
guy 1: those guys are tight... they gay or something?

guy 2: nah, shad and kain are bromates for life.

guy 1: ahh... i'm totally jel.
by kain mcleod April 02, 2008
 
2.
The connection between two bros who truly understand each other and have kindred spirits.
"Dude, you're awesome. You're my bromate!"
by PizK September 27, 2011
 
3.
1. Like soulmate but with two dudes

2. Two dudes destined to spend their lives not boning each other but hanging out like champions regardless
Dude we're like... we're like bromates. Like I don't want to bone you dude, but I'll tease your hair, I mean fuck it, we're bromates.
by Maximus Decimus Merbrodius January 23, 2013