lick job

noun1

1. •
   (slang, vulgar) The stimulation of another person's genitals by licking with the tongue as a sexual act.

   • She said if I like what I saw that she wouldn't mind if I tasted it. I gave her the best lick job of her life. I devoured it, I caressed it and continued eating it while she was talking on the phone. — 1984