Onseener

An Onseener is a person that reads your text but doesn't reply back, they leave you On seen and its frustrating to other people.

Wow Jessica, You freakin "Onseener" reply back! Don't leave me On seen!

by Crusty12 September 21, 2016

Onsala

Located in sweden its the best city that has ever existed, it was built in 1337 and is now a shitfest

I was in onsala!
Oh shit, did you subscribe to u/deadpoppin
Ofc is did! Link in description!

by /u/deadpoppin August 16, 2019

onstwt

the seraph of the end fandom on twitter which is just as dead as mika

“hey, what happened to onstwt?”
“idk, looks like they’re dead”
“....just like mika..”

by ceren 👍🏼 October 25, 2020

onsmrs

On Some Real Sh*t

Don’t even worry onsmrs he fumbled you!!

by igotyoudw October 28, 2023

Sudden Onset of Hyper Retardism

An infectious disease which causes the victim to frequently act in an extremely retarded manner, may it be in the form of making whale noises while clapping their hands like a seal, or staring at the ceiling while drooling helplessly and laughing as if possessed.

Symptoms include, but are not limited to:
* Wailing making whale noises
* Suddenly yelling 'Iowa' in an extremely retarded manner
* Laughing helplessly after making a bad joke or thinking about something remotely dark
* Acting autistic in public
* Making weird noises which include, but are not limited to, 'IOWAAAA', 'HUEEEEE', 'KEKKEKKEK' etc.

Person 1: "Hey, did you hear about John?"
Person 2: "Yeah, he was fine at the party until he had a Sudden Onset of Hyper Retardism... poor fellow lost it then and there and passed away making whale noises."

Person 1: "I couldn't stop laughing after reading the word 'special assembly' and imagining a bunch of students standing in lines, staring at the sky with their heads crooked, drooling from their mouths and endlessly laughing."
Person 2: "Yeah, well, you had a Sudden Onset of Hyper Retardism. Relatable."

by specialneedsbear June 8, 2018

Adult Onset Diabetes

More correctly, Type 2 Diabetes. It is a form of Diabetes caused by complex interactions between carbohydrate consumption, insulin resistance, and obesity.

The United States has an epidemic of obesity and Adult Onset Diabetes due to the effects of eating according to the Food Guide Pyramid and % Daily recommended allowance.

by Downstrike June 26, 2004

onseminate

To spray semen upon someone, thus avoiding insemination

Dude 1: How will you defeat the bear?
Dude 2: I will onseminate him, and he shall be ashamed.

by kelliq January 12, 2010