A term used in Connecticut for the dance that was made in the 860 area code, particularly Hartford. It involves imitation of common activities such as making a Rubix cube and shooting guns.
"Yooo you saw how he was freaking it at the party? I wish I could dum out like 860 heads."
"I'm a pro at dumming out, play some Gangstalicious for me."
"You cant dum right my guy, you're from 203."
Similar to air guitar, air drumming is when one pretends to play the drums as if they are holding sticks and have a drum kit in front of them when in fact, they do not.