1) Also known as ass wink or A Brown Pucker. When a chick flexes her anus in the 69 position this is a "Stink Wink"
2) Farting as a response or greeting.
1) Meghan thinking (he's doing such a good job down there I think I'll give him a stink wink)
2) (Foul Stench noticed as John leaves the room, Dude what the hell was that?!?) It's a stink wink, you heard me right!