lip

noun

1. either of two fleshy folds of tissue that surround the mouth and play a role in speaking
2. (botany) either of the two parts of a bilabiate corolla or calyx
3. an impudent or insolent rejoinder"don't give me any of your sass"
4. the top edge of a vessel or other container
5. either the outer margin or the inner margin of the aperture of a gastropod's shell