brother cousins 

The offspring of uncle dads. In other words “keeping it in the family”

I got to see my uncle dad today and see my brother cousins.

brother cousins by EBLikeThat March 10, 2018

Sister/brother/cousins 

When sisters share a baby daddy their offspring would be sister/brother/cousins.

Or if a brothers have the same baby mama their offspring would also be sister/brother/cousins.

We not just cousins, we sister/brother/cousins.

Sister/brother/cousins by Babygirl💋😍 May 26, 2022

Brother Cousin 

A biological cousin that also like a brotherly figure to you.

He is my brother cousin.

Brother Cousin by thisisntthekrustykrabs April 26, 2022

Brother cousin 

Male cousin

brother cousin is picking me up today

Brother cousin by 459395 April 3, 2023

father's brother's nephew's cousin's former roommate 

Someone whom you have no relation to in genealogy. A joke in the movie Spaceballs

"I am your father's brother's nephew's cousin's former roommate"
"And that makes us?"
"Absolutely nothing! Which you are about to become!"
(Quote from Spaceballs)

father's brother's nephew's cousin's former roommate by psofrn November 8, 2012

brothercousin 

A brother who, due to an incestuous relationship between one's parents, is also a male first cousin.

My brothercousin Cletus done gone stole my meth.

brothercousin by sarge42 July 13, 2010

Cousin Brothers 

You have the same dad, but your moms are twins

When you think your cousins mom is hot however , she is your moms twin....cousin brothers problem

Cousin Brothers by Sheltered one June 1, 2018