T-Rexin'

1. A weirdo who is creepin' (made popular from "The Creep" by Lonely Island)

The act of masturbation using the hand with all fingers pointed down, mimicking a T-Rex claw

When someone gets so drunk they are beyond blacked out, and are so drunk that it is a state of mind, causing said person to hold their arms in a perched position like a T-Rex.

Bobbing up and down on the dance floor with your arms scrunched up to your sides mimicking a Tyrannosaurus Rex. The most fool proof dance move to grab the opposite sexes attention apart from the robot. If you add a growl to this dance move it will ensure you a phone number 60% of the time every time.