Finger moustache
To tattoo a moustache on the inside or outside of your finger, most commonly the index-finger, and placing it under your nose.
Oh my, look at Stacy, she is flashing her finger moustache.
finger moustache
When someone curls their index finger into a square shaped moustache means they want to aggressively make out with you
“Katie is doing the finger moustache, you know what that means😏”