fart brothers 

when you and a friend fart at the same time and the smells combine

Dylan: did we just become fart brothers?

Ty: with our powers combined, we are fart brothers!

fart brothers by Fart Brothers June 25, 2017

Brazilian Fart Brothers

Two different dudes that have eaten the same ass. Somewhat similar to Eskimo brothers.

Person 1: "Bro I ate Niki's fart box the other day"

Person 2: "No way, I ate her ass last week! Does this make us Brazilian Fart Brothers?"

Brazilian Fart Brothers by Whipdad August 13, 2016