A close friend or relative that has had sexual intercourse ( oral counts as well as penetration) with the same woman as you did.
When two guys have a threesome with the same women they will for ever be Pussy brother
You: Hey man guess what ?
Friend: what man?
You: I finally fucked Jennifer last night!!
Friend: no way!! That makes us pussy brothers
You: hell yeah! Pussy brother
you: right on
Friend: hey man, I got a confession to make…
I Fucked your wife last weekend
You: no way brother, we’ll I guess that makes us pussy brothers for life
Friend: yep so it does.
You: right on brother