Two men that have had sex in the same room.
Danny fucked his girlfriend in Trey's ex's room damn they're igloo brothers now.
by wapato262 September 10, 2021
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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."

Man 1: "We're "igloo brothers!""
by Chill V. April 5, 2010
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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.
Wait a minute bro, you lived at 123 East Washington Street? Me too! We must be igloo brothers!
by thecraftsman March 9, 2018
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