BASKETBALL, where you (and only you) play against one other person
I played against Santiago in a one on one basketball game
by Home slice August 15, 2005
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An informal code of street fighting, not allowing bystanders to interfere in the fight.
Hey bitch-ass, let's square it up one-on-one in the midldle of the street!
by PGrace August 5, 2003
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a bag of heroin and coke together.
i wanted to do a speedball so i told my connect i need a "one and one" bag.
by fresh stallion April 12, 2010
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san francisco bay area slang for a combination of cocaine and heroin, aka a "speedball". a hit of tar heroin and powder cocaine sold together on the street for $10 to $20.
if youre in a san francisco neighborhood such as the mission, and you hear a guy calling out "one on oners, one on oners", hes not challenging you to a game of basketball.
by beau "oma" taylor March 14, 2010
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The person that makes you change everything you said you wouldn't ; put it down in every way ; the one you meant to be with ; time enough : able to control without force ; Mesmerizing
Boooooyyyyyyyy, You the one one!
by Aneres April 13, 2016
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In paintball, when a player on one team and a player on the other team mark (shoot) each other at the same time, therfore resulting in a "one for one", one player is eliminated with another player from the opposing team.
Larry ran to bunker Steve and Steve shot Larry as Larry shot Steve. The ref couldn't tell who shot first, so he called a one for one.
by Kyle Taylor May 9, 2007
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1. When you go from dating someone to being in an exclusive relationship.
2. Becoming someone's boyfriend or girlfriend.
Friend 1: Dude, when are you guys gonna go one on one?
Friend 2: I'm not ready for a relationship yet.

Friend 1: I thought you were going one on one with her.
Friend 2: Naw, man. I don't want to give up the other pussy.
by Juppy George January 16, 2009
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