Onc 

Onc means on crip that gang members of the crip organization use while texting

Tyrone: these girls be playing too much

Marquon: that’s onc cuz

Onc by Criponc December 4, 2019

ONC 

A popular Steam community group (One Nut Crew) that initiates their members through shooting one of their testicles with a revolver, typically one made from gold. Officially formed April 24, 2013 by founder Keenan "Vern" Evans, ONC frequents many games, usually online, such as Garry's Mod, RoboCraft, Minecraft, Unturned, ARMA 2/3, and many others. They can be found on the steam community website under OneNutCrew.

"I ran into those ONC guys a while back, I could tell they were doing initiations by the gun shots followed by a long, high pitched scream."

ONC by FatherVern July 22, 2014

Onc 

Instead of saying “ I swear” or “ong” ( On God). Crips gang members or crips affiliated say “onc” (On Crip).

When you swear on something

“Onc Ima beat that n*gga ass.”
“We instantly fell in love with each other on crip.”

Onc by LAGangS December 6, 2018

ONC 

Oral No Condom; what people use to get promotions.

Kim: "Hey, I got a promotion at work today!"
Andrew: "How did you get it?"
Kim: "ONC."
Andrew: "Oh, Oral No Condom, nice."

ONC by VSU June 24, 2007

Onc 

It's like saying ong, or on god, but it's on cum.

Boy: Zamn u see that sexy boy over there
Boy: Onc he lookin mad cute

Onc by zaddy_6s February 15, 2022

onc 

on chloe

person 1 - "bro she's a 10."
person 2 - "that's onc."

onc by thatsoncbro February 9, 2022

ONC 

Means on cock or on cum. (Variations of ong which means on god.

You said onc that you would get hard from our Spanish teacher.

ONC by Zaddy Zalil February 16, 2022