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1.
A term that guys use for their very good friends. A mix between brother and boo
"Hey man, whatcha doin" "Oh not much, Broo"
by Splatoo7 August 22, 2009
 
2.
The act of drinking a beer (or brew) while on the toilet, preferably taking a poo. It is a combination of "brew" and "poo".
Person 1: Man, I really need to take a poo right now but it feels like a doozy that might take a while. I don't wanna just leave my beer here and let it get warm...

Person 2: Why dont you just take the beer with you and enjoy yourself a nice Broo, it will make time fly!
by Vague123 May 27, 2011