lip

(noun) either of two fleshy folds of tissue that surround the mouth and play a role in speaking.

(noun) (botany) either of the two parts of a bilabiate corolla or calyx.

(noun) an impudent or insolent rejoinder. Synonyms: sass, sassing, backtalk, back talk, mouth. Example: "Don't give me any of your sass."

(noun) the top edge of a vessel or other container. Synonyms: brim, rim.

(noun) either the outer margin or the inner margin of the aperture of a gastropod's shell.