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1.
Close friend you consider part of your "group". Term of endearment for a buddy that you often party and cause mischief with.
"you ready to mess shiz up tonight bromein?"

"hellz yea!"
by Clayface July 23, 2009
 
2.
A sir and/or bro of the Asian variety.
Nah man. There's no time to stop for bromein.
by fnwordsmith June 29, 2011