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The unnecessary and mysterious pocket covering the crotch in men's underwear, usually tighty-whiteys. Useful for holding whatever men may wish to keep close to home.
Girl 1: I tried looking for tight and sexy underwear for my boyfriend, but I couldn't find any without the manpocket!
Girl 2: I love a man who wears a manpocket.
by lizfromcanada November 01, 2007
Storing items in a male's foreskin as opposed to his pants pocket
Jonathan stores his cash in his man pocket and he received a paper cut to his mushroom head.
by BlackHelmetMan March 11, 2012