Oncest 

When the two versions of the main antagonist (The Onceler) in the Dr. Seuss book, The Lorax, are having sexual intercourse with each other.

I, the creator of this definition, had recently found oncest fanart on my TikTok For You Page because once my friend sent me a video as a joke and now it's all over my For You Page. I was so disturbed, I cried into a piece of stale bread.

Oncest by XAXAXAXXAXAXXAXAXAXXAXA June 18, 2023

oncest 

slang for "once"

Would you do as I tell you for oncest!

oncest by aarby08808 February 4, 2018

oncest 

when your on top of your family memebers but not fucking them

“that’s incest”
“no that’s oncest”

oncest by bitchybitch29 July 4, 2020

oncest 

when one sibling is on top of the other

this isnt incest, this is oncest.

oncest by hoepp69 July 4, 2020

Onesty 

A very real and unapologetic female who doesn’t really care what anyone thinks. She will put hands on both male and female & she is trying to change as a person for the better but motherfuckers keep pissing her off.

Onesty: *checks urban dictionary for a word that’s not even her name and decides to search her name too*

Onesty: That’s funny that “Jayceiscool” or whatever the fuck it is posted something about my name a few days ago. It’s even funnier that I know someone named Jayce personally (coincidence? I think not) and if he thought that shit was funny, I can’t wait to see him in person. I’m not laughing little bitch. No exaggeration he is a little bitch.

Onesty by IM JUST BEING HONEST May 18, 2019

A'onesty 

Shes beautiful 😍 and the greatest thing you could ever have 💍don't ever leave her she's a keeper 🤞 she a whole goof and can make anybody's day better 💗!!

I Love me some A'onesty

A'onesty by Prettybabes !! October 17, 2017

onestril 

Noun: Onestril is when ones septum becomes deviated turning you into a noseclops.

Last night, I had so many nose beers, I was Onestriled! I looked like a noseclops.

onestril by Kdaaawg January 27, 2018