To do something for one quick second but you sayin one time, that doesn't really mean one time. A Lowkey activity or scheme should be mentioned to all involved parties as doing it for the "one time". But it's just something either Lowkey as hell or an activity you do once a week. A daily activity is NOT for the one time.
"Yo fam, you tryna hit benihanas for the one time?"

"Yo fam, you tryna give me a ride to the crib for the one time?"
"Aye FAM lemme hit the joint for the one time"
by YunqFam April 1, 2015
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When you yeet on somebody too hard, and they get upset, to let them know it was a one time thing and you won't ever nae nae on them or hit that soulja boy in their face ever again, you tell them it was jus one time for the one time
Yo, my bad man, when i whipped on your little brother it was just one time for the one time
by Devdood1232 February 9, 2018
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to do something only one time in your life. (Usually used when talking about sex)
"Hey, Maria, do you want to have sex one time for the one time"
by Daquan8520 February 13, 2014
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police officer(s)

primarily used in west

see five-o jake the law
Yo! One up holmes, it's the one-time!
by Johnny Twoguns August 13, 2004
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Police. See #1. You look at them one time. If you double take or look too long you might attract their attention. In doing so, with a cop with nothing better to do and if in their minds they suspect an ounce of fishy shit going on with you, expect to get followed for a bit so they can check your plates, pull you over and/or get talked to to see what's up with you.
From the movie Street Kings

Coates: Man, we got the one time up in here. Motherfucking po-po. Is there any square cops out there? Or is everybody out for theirs?
by Freeloading Will July 19, 2010
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A phrase used to describe the act of being or getting "fucked up". It is a versatile term that can be shouted out loud to show enthusiasm towards getting "messed up" on whatever you prefer.
Examples:

1. Ya buddy lets get One Timed!
2. Those keg stands really got me One Timed!
3. Grab the Grav, I wanna get One Timed!
by FeedUsMcFetus August 28, 2010
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