A person who has participated in sexual relations at some time in the same geographic location as another.
I wonder how many Eskimo Neighbors I have after staying in this hotel.
Two people who have had sex with the same person but not in the same hole.
Dude 1: yo I fucked my homie Ryan in the ass the other day
Dude 2: YOOO I fucked his face yesterday!!!
Dude 1: guess Eskimo neighbor’s bro
When you have sex with a sibling of someone your buddy has had sex with.
Dude! If I had sex with Heather, and you just piped her older sister last night, that means we're eskimo neighbors!