When you hum lightly and put your face right inbetween a fat girl's tits and shake your head vigorously side-to-side, keeping your lips and cheeks loose so they flop around and make an audible sound.
This act can also be performed on well-endowed thin women.
My god, that fat chick is busting out of her tank top both above and below! You think she'd slap me if I went over and gave her an angry polar bear?
by NAW November 24, 2006

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