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

brothercousin 

The opposite of a cousinbrother.

Brothercousin this is your cousinbrother, lets go bowling.

brothercousin by brothercousin November 25, 2014

brothercousin 

person who you assume has mental disabilities due to genetic problems from being inbred, you assume they are simultaneously someone's brother and cousin.

'man that guy has been trying to push open that pull door for like 3 minutes.'
'he's a brothercousin, no doubt.'

brothercousin by saucebaus August 25, 2011

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