To have a one-on-one contest, usually on the basketball court, but sometimes fisticuffs.
"If you think you're so good, let's go ones on the court and I'll school you."
by Sam Kornfield October 09, 2006
good one. when describing something that is/ was a good one, you put the two words together and you get goone.
"Great joke, that was a really goone."
by B.mills November 20, 2008