Top definition
Lying about giving/receiving oral sex to/from someone, which includes sucking dick, eating pussy, licking ass, etc.
WOMAN: You know that girl said you ate her out. But, I knew she's lying on your mouth because you was home the whole time.

MAN: When you see that chick again, have her come to my office. She's gonna answer to me for that.
by Mr. Terrence L. Trezvant January 26, 2007
Get the mug
Get a Lying on your mouth mug for your father-in-law Abdul.