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(noun): A rather large portion of fat extruding from a person's (man or woman) shirt, so much the belly is sticking out of the shirt he/she is wearing. The inverse of cleavage.
Eww she is showing some serious underbelly cleavage. Turn away!
by UNknownINformant May 22, 2009

Words related to underbelly cleavage

bellyfat cleavage clivage kegger potbelly