kutzwager

Etymology
Compound of. Reportedly originated in the student slang of Amsterdam in the 1960s, but popularised by the play Kutzwagers by from 1984.

Noun

 * 1)  A male acquaintance who has had sexual intercourse with the same woman; one of a pair or group of Eskimo brothers.

Usage notes

 * The word is typically used heteronormatively and androcentrically, designating a relation between two men.