two or more men who have developed a bond by having had sex with the same woman at one time or another. usually becomes known after the fact and is a term of endearment used when there is absolutely no resentment resulting from the situation.
Man 1: "You'd be doing me a favor if you seduced my ex-girlfriend."
Man 2: "I'm glad that wouldn't piss you off, because we had sex last week."
A derivative of "eskimo brothers", but instead of both men having sex with the same woman - it is that both men independent of when - have masturbated in the same home.
Igaloo brother is defined as two men that fuck the same girl in the ass, therefore having to accept certain concessions when each other asks. Not to be confused with eskimo borthers which is sex in the pussy.
1st guy: Yo man i fucked Charlenein the asslast night 2nd guy: I fucked her last Tuesday bro
1st guy: igaloo brother
2nd guy: buy me a drink