Broster

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 26, 2011

Broster

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 9, 2010

Brosterbation

When you are missing your bro or homeboy. So you master-bate to their image or think about them.

Bro:1 I miss bro 3
Bro:2 ya I miss him too that's why I was totally brosterbating to him last night
Bro:1 I wonder if he's brosterbating to us right now
Bro:2 I hope so

(brosterbation)

by Bro:3 October 21, 2011

broster

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

Broster

A guy with a penis and a vagina

Dude I have a broster

by SuperSayan November 30, 2018

Bromster

A Bromster is the combination of a Bro for life and a Master. So someone who is not only a dork who you can do the wildest shit with, but who also teaches and supports you.

"Thanks mate, you really know what to do!"
"No problem, remember I am not only your Bro, but also your Bromster. Call me when you need some advises again."

by Luan T. Nexi December 15, 2018

Broster

A Broster is a person of any kind that is a brooo

"what up broster"

by broster_123 December 20, 2019