No Look Gun
A "No Look Gun", or NLG for short, is a hand gesture often used as a salutation to those whom you want to impress your coolness upon. It is executed by pointing one's finger, like a gun, at the intended target and making sure to not look in the target's direction.
"Wow, Jimmy just gave us a No Look Gun, then drove off blaring 'Who let the dogs out?'"
"What a cool guy!"