What I do to scare people. Created by putting one's tongue slightly out of the mouth then pulling back and lowering your bottom lip. Sounds vaguely sexual.
Kate: "Got pulled over last night for going 70 in a 55 and I thought he'd let me off if I flirted with him... but it was THP and they'll never give you a warning, EVER."
Samantha: "He probably didn't give you a warning because you're ugly and can't flirt."