1 definition by Kate1982

Top Definition
When a man or a woman, who has recently had a close encouter with posions ivy, performs cunnilingus on a woman. A sudden swelling in that region is known as the FAT LIP.

fat lip

This also works with heavy petting. Her labia lips will swell. A la, the fat lip.
Teddy came home with poision ivy last night, and gave Tina a fat lip.
by Kate1982 August 22, 2006
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