A way for creepy people with porn mustaches to say hello or "I understand". Hold your fingers in the shape of guns (use both hands for maximum effect) and point at someone who just arrived. Bend thumbs to simulate shooting your finger guns and make a clicking sound with your mouth. May be accompanied with a wink in extreme cases.

its the way some people react to a joke or a greeting. by snapping their fingers, pointing them immediately afterwards, and is sometimes followed by the word, "Ayy"

That sign that you make with your fingers so that your fellow bisexual recognize you

Used by placing the "gun" to the side of one's own head or under the chin, as if committing suicide, to indicate a strong desire to be put out of one's misery, either from boredom or exasperation.

When you you’re fingering her and put your thumb in her butt and go pew pew pew

A safe word for bisexuals for getting recognized in a crowd.

Also frequently used in film theories.

What douches do in two-person photos. The d-bag will put one hand on the back of his companion to relax and distract the person. With the other hand he will make a gun shape and point at the person's upper body. The other person is now a douche too, but isn't aware of it because they're looking at the camera.