Broster 

My biological brother, who is now transgender completed, is my broster. He used to be my brother (bro), but now he’s my si(ster); hence, broster. We need more words to describe these relationship changes.

My broster invited me to her home for dinner.

Broster by Raven Roman February 8, 2022

Broster 

Combination of Brother and Sister

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.''

Broster by Rednosedee October 20, 2009

broster 

A person with traits similar to both a "bro" and a "hipster." Some of the traits they will assume are a defensive attitude, terrible tastes in music, tv, and music. There cigarette of choice is "Newps." Also there appearance will shift between high sports apparel and standard hipster gear.

Note: Beware, depending on their mood brosters can be very violent when called brosters.

Janet, I'm sorry to say this, but your roommate Clarissa is becoming such a broster, we can't hangout with her anymore.

broster by deadendkid December 6, 2010

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

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

Broster by Benenenenenenenenenenenen December 9, 2010

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!"

broster by DanTheManBrodozer January 31, 2016

Broster 

A guy with a penis and a vagina

Dude I have a broster

Broster by SuperSayan November 30, 2018