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(bris-tur)(n) 1) a female sibling that has more masculine qualities than feminine. 2) a male sibling that has more female qualities than male. 3) shim. (usually referred to as an it instead of a person)
This is my mom, dad, and the unfurtunate life form, my brister
brister by hozey777 September 7, 2005
People who engage in the practice of "brimping" which is a sex act where a woman wraps her hair around a man's genitals and masturbates him till orgasm.

The term "brimping" gained popularity with fans of the comic Sex Criminals, published by Image Comics, with fans referring to themselves as "brimpers."
Those fans of Sec Criminals are some freaky brimpers.
brimpers by Gatorfanfox July 20, 2017
he was a man but is living as a woman,and now she is my brister (brother-sister)
brister by worderamma 65 July 28, 2009
A combination of Brother and Sister, a hermaphrodite sibling.
"Is your new sibling going to be a new brother or sister?"
"It'll be a brister!"
Brister by Lexibutt September 12, 2011

bristerhood 

The bond formed when playing in a Fortnite squad with 2 males and 2 females, frequently leading to sexual intercourse.
Bobby, Sally, Janie, and Craig thoroughly enjoyed their time together in Fortnite and the following sexual expedition, a true display of Bristerhood.
bristerhood by Philip Goes Blind February 18, 2018
He refers to Himself as Her
A Brother pretending as a sister
Is a Brister
Brister by Offabit November 15, 2018