unbrother

The step brother of your half sibling OR the half brother of your step sibling.

she married my unbrother, so I guess now she's my unsister-in-law

by ridl February 22, 2009

unbrother

when u stop being ur brothers sibling

if u don't stop snoring ill unbrother you

by Dorro January 06, 2022

Unbrother

The act of emotionally removing oneself from a sibling, specifically being a brother.

Lenny has been unbrothered.

by AGBBibag December 31, 2011

Unbrother

"Unbrother" is a informal term used to describe someone who disregards the bond of brotherly love or friendship, even though they are not necessarily blood-related. It implies that this person has disregarded or betrayed the trust and closeness associated with a brotherly relationship.

Xuan Li: I am unable to go to the club with you guys tonight.
Kevin: Its okay, i'm used to it, you're an unbrother

by AdrianLim69 February 06, 2023