One eyed monster 

A guy who blew one side of his head off with a shotgun.

DoD you see the one eyed monster on rotten.com? Half his face and head was missing.

One eyed monster by Solid Mantis June 15, 2018

One-Downing 

One-downing is simply the opposite of one-upping.

Also known as a "race to the bottom." This tactic is used by everyone from fast food produces, horror movie directors, indeed the President of the United States of America, to shock people by showing them that the bar can still be lowered.

While many fast food producers are scrambling to one-up each with healthy offerings, KFC is one-downing them all the with the double down sandwich.

One-Downing by SearchFHG June 16, 2018

One Fast Boi

A bullet that hits its intended target.

Hit that nigga in Lisbon with that one fast boi, that nigga be pushing daisies now.

One Fast Boi by El ritardo June 29, 2018

One Eyed Reaper 

A non-existent character which is a bastard

Are you a One Eyed Reaper?

One Eyed Reaper by Janev July 6, 2018

one inch demon 

A confident little penis that can please a partner all night long

"his one inch demon wouldn't stop, not even at 10 am!"

one inch demon by Ariegl July 16, 2018

One-Shot 

A Term typically used by virgin gamers to inform teammates that the opponent is low on health...

...Most of the times they aren’t.

Ahhh yeah, he’s One-Shot

One-Shot by TreHitEmUpp July 27, 2018

One Direction

One Direction is a English-Irish boyband, consisiting of Niall Horan, Harry Styles, Liam Payne, Louis Tomlinson and previously Zayn Malik.
One Direction went on a hiatus early 2016/late 2015 and have all started solo careers since.
They said it'd be a 18 month long hiatus, IT'S BEEN 25 DAMN MONTHS.

Person: I love Logan Paul's music.
Intellectuals: Lemme show you some real music, made by 1D, some lovely lads that didn't film a suicide victim.
One Direction consisted of 5 lovely members.

One Direction by Peoplecallmeageek July 30, 2018