The worst insult you can call someone. It is typically used when you are really really pissed off at someone.
by Skipah123 April 02, 2009
by sone & once February 12, 2017
by MangoBerry October 14, 2020
by Criponc December 05, 2019
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."
by FatherVern July 23, 2014
In the same tradition of 'deuce,' a once is going number one in the bathroom. A once is a noun, like a piss.
by RGW May 27, 2008