1 definition by procrastinater...

1. (noun) a person who is so unbelievable masculine, strong ,brave or ballsy.

2. Also a person who has performed an unfathomable action (positive)
Guy 1: Dude, I just scored that chick over there!
Guy 2: Ah, you tank!

Guy 1: I just done a 1000 press ups!
Guy 2: You Tank!
by procrastinater... October 23, 2009
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