Top Definition
A name you call someone when they're acting like an asshole, but they are still your bro even if they're a jerk.
"dude, Dain stop being such a brosack, k bro?"
by theOctYatVlog April 06, 2010
a guy whos usually a bro, but being a jerk at the present moment.
"Wow, Jeff's the man, but he just totally just d-blocked you"
"Ya, what a brosack."

by Dj Gj January 11, 2009
Someone who is a dick and always gets in your way. Going on a date......... well you got a third wheel. Also they take your money and eat all your food.
" I'm going out tonight but my fucking brosack is being a dick and can't find any other friends to tolerate him so hes coming with".
by Fluffy Pineapple June 02, 2015
A Pull String Backpack
Liz: Man I am so bro sporting my brosack.
by staybro12345 December 08, 2010

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