When on acid, you spin a slinky really fast in front of a bright light, you're chucking a deuce when you get two circles to form.

The act of greeting another person, basically saying hello in a more ghetto fabulous way. A deuce is chucked when you hold your middle and index fingers like a peace sign, sideways with knuckles showing to whomever you are greeting.

Great way to show respect, say hello, greet anothe from a distance.