one-hit wonder 

someone with only one hit song and they dont comeout with another hit

peaty pablo was a one hit wonder with his song raise up

one-hit wonder by zack September 28, 2003

One Trick Pony 

Generally used in MOBAs, this is the act of using only one person/character in a game, without stray.

Man 1: I only play D.Va.
Man 2: Then you're a one trick pony.

One Trick Pony by Skitzophrenic May 9, 2018

One-Two

When you do something for a short period of time

Friend: "Yo you down to reach the bar tonight?"
Me: "Nah man, I got work tomorrow"
Friend:"Bro just have a one-two drink"
Me: "Aiight"

Friend: "You still banging your ex?!"
Me: "Nah bro it was just a one-two"

One-Two by justaonetwo November 9, 2019

One Hit Shit 

Weed so potent and THC-laden, it will get you crazy-stoned off of one hit. Contrary to popular belief, this is no myth. I have smoked two types of weed powerful enough to get me ripped off my ass on one hit: White Widow, and the almighty Pink Hawaiian.

My friend got the hook ups with the best weed in town: Pink Hawaiian. One hit had me tripping, I thought the room was at a 90 degree angle and that I was falling into a black hole. That was THE one hit shit.

One Hit Shit by scrubby122 November 1, 2008

one over tanch (1/tanh) 

slightly obscure this one, but was nevertheless widely used for a while in central london. it means to chill, relax, often along with smoking weed. derived directly from cotch, its root is interesting... the mathematicians amongst you will know that hyp(cos) is written 'cosh', and pronounced 'cotch'. this is trigonometrically equivalent to one over hyp(tan), or '1/tanh', pronounced 'tanch'. most people are unaware of this - its nevertheless used widely.

lets go back to mine and one over tanch it down...

one over tanch (1/tanh) by CJC Corn November 25, 2004

one-second wonder 

A girl who seems hot at first, but then you realize her to be much less attractive than you previously had hoped.

That girl was fine, but it turned out she was a one-second wonder.

one-second wonder by HWF August 13, 2006

One legged ghost 

the act of ejactulating on a girls face, then covering her face in flour, then finally stomping on her foot.

i was out at a party with joe, and gave this chick a one legged ghost in the bathroom.

One legged ghost by Dubstyl June 12, 2008