8
A Broster is a bro that tries to be a hipster. Generally they have their pants turned up once, or shorts just above the knee. Not too high. They wear hawaiian shirts and bright neon hats. They call themselves hipsters as well. Typically they are in frats. Brosters are not to be confused with hipsters.
Guy 1: That dude is a total hipster!
Guy 2: Nah man, He's fakin. Definitely a bro turned broster.
Guy 1: wow lame
by africacoffee March 06, 2014
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9
A brother who acts girly, or sister who's one of the lads !
Could be used for friends, with platonic friendship.

Broster : '' Like a sibling, but even better.''
by Rednosedee October 20, 2009
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10
1) Short form word describing one's sister-in-law's brother, as it is ordinarily too long and complicated to explain the relation - as the individual is not really family, but is more than a random friend
1) I'm heading out on the town tonight with my broster
by Heeeres Johnny April 08, 2011
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11
IN some parts of South-East England, the word 'Broster' is used to describe something that has gone seriously wrong. The term was derived from one AS chemistry student who relentlessly dropped glassware by accident throughout the year. As the term became more widely used, to 'Broster something up' or 'brostered' became used for anything that has gone badly wrong, so it was no longer only applicable to broken glassware.
Boy 1 (Drops glass test tube)
Boy 2 - Dayemm fool, you brostered that up big time
by Benenenenenenenenenenenen December 06, 2010
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12
A word of endearment for your brother- by blood relations or friendship.
Daniel(Eldest Brother) - "What's up broster! How was work?"
Michael(Youngest Brother) - "Yoooo, what's up broster!! Work was fun and easy today!"
by DanTheManBrodozer January 31, 2016
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