One-Man Slut 

A rare specie of woman who, although dedicated to her boyfriend, has a sex-drive fit for the average female Velociraptor during mating season. She will constantly fuck her man (usually having a massive sex drive himself) until the point of soreness for both of them. The moment the ointment takes effect, they will start fucking again. Birth control is a very important factor in a relationship with this type of woman.

"Wow... did you see the way Shauna was fucking Derek during the entire vacation? She didn't look at any other guys, either. There's only one thing that can mean..."
*dramatic pause*
"We have encountered the elusive one-man slut. "

One-Man Slut by Blarg-chicka-honk-honk August 12, 2017

One Eight Train 

When a subject suspected of criminal activity is captured by police using stealth, speed and incomparable power.

Oh man, that crackhead just met the one eight train.

One Eight Train by John Ro$$ November 28, 2017

one inch bergen 

A slang used by people who know the real name of OMFG (music producer) calling out his small penis.

Person 1: Dudeee! Have you heard of the music producer OMFG aka. Alex Savage?
Person 2: Yeah, he's a one inch bergen.

one inch bergen by kurtsiberg February 25, 2018

One Punch Man 

A bald guy named Saitama, who is a hero for fun and he can technically kill people, aliens or whatever he's fighting with - like the car alien- with one punch. He has a "student" named Genos and he's a cyborg, they applied for the hero association and their names are "Bald Cape" and "Demon Cyborg"

It's a very awesome, lit, funny anime so you should watch it.

How to be One Punch Man 101:
"100 push-ups, 100 sit-ups, and 10 km run EVERY DAY

One Punch Man by TheDicer44 May 28, 2019

one 9ine 

one 9ine means to shoot 1 mag of 9 millimeter bullets into someone.

"Ima one 9ine that yute"

one 9ine by Popinyoyo September 30, 2019

One-handed 69 

An ancient technique so powerful few have survived. A man grabs a woman with one hand by the ankle upside down. The woman then proceeds to wrap around him twice then eat his ass. While eating his ass the man shits in the woman's throat afterward she proceeds to make out with him. Only 3 people have successfully completed this dangerous maneuver. If completed rumors say that you gain the power of levitation.

-Nathan Elijah Garcia

Dude do the One-handed 69 on her

One-handed 69 by Nate_G October 13, 2020

one peak 

otherwise known as one piece (I LOVE ONE PIECE!!!)

one piece fan 3000: yo do you watch one peak?
british person: wtf is that

one piece fan 3000: *brutally dissembles british person*

one peak by onepiecefan3000 April 14, 2022