The term commonly used for your sister who looks like she could be your brother.

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.

Combination of Brother and Sister

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

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.

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

A word of endearment for your brother- by blood relations or friendship.