Throw up 2 fingers to mean peace out, later, adios.
Throw up 2 fingers to show a sign of respect and/or greeting.
"I won't diss my OG so imma chunk a deuce for Paul" - Chamillionaire - "Roll Call" - Mixtape Messiah "Lean back or throw ya leather, chunk a deuce, and show your grill" - T.I. - "Front Back"
Throw up 2 fingers in a sideways peace sign. A sign of acknowledgment of someone else. In Tallahassee, FL, this is widely recognized as the identifying hand gesture of Victoria Sartori
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.