The process of crossing your fingers by putting the inner fingers over the outer fingers, creating two prongs on each hand. Often used to let somebody know that they are being "crabby."

A dance move where one puts a large frown on his face, crosses his eyes and moves around making crab pincers with his hands. It is essential to get up into peoples person space while preforming the Crab Hands.

When one repositions and moves their hands in a quickly-paced pinching motion, similar to that of an angry crab.

When your hands start to make shapes similar to that of a crabs hand/claw while playing Guitar Hero. Also known as Guitarthritis.
Some also call it Crabbing which is the the actual process of getting crab hands.