When two guys each have sex with a different full blooded sister.
what's up Joe, I just banged Becky. Really? I banged her sister! That makes us Eskimo brothers-In-Law!
by Mushroom Stamper April 10, 2015
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When you think about your friends girlfriend while masturbating.
Hey dude i was thinking about your girl while i was jerkin it.
Dude i was thinking about your girl while i was jerkin it too.

we are so eskimo brother in laws
by Lilseanzie December 9, 2009
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When one jerks it to their friend's hot sister.
I totally rubbed one out to Greg's sister last night; that makes him my eskimo brother in-law now right?
by the leagueeee December 21, 2010
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