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When two males acknowledge having hooked up with the same female but not performing sexual intercourse. They never entered the igloo but merely explored the vast tundra much like a penguin.
Bro #1 "Dude did you bang that chick last night?"

Bro #2 "nah dude... I only got to 3rd base"

Bro #1 "me too! Penguin brothers!"
by Bagel2135 February 06, 2014
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