Onva-Cavo

A captured dismembered being missing all limbs but their head. Typically French people.

"If they don't shut up, were gonna have some Onva-Cavo's on our hands" said Riley

by OingusJoingus March 26, 2023

Onaga

A character from the Mortal Kombat series. He has the appearance of a humanoid dragon. He is the former ruler of Outworld and the predecessor of Shao Khan. He is a boss character and one of the most powerful characters in the Mortal Kombat universe. Often referred to as "The Dragon King Onaga".

Onaga is a big scary dragon boy huh?

by Gir-Geed July 1, 2023

Onanana

A super hilarious individual, who never really stops talking. Their hilarity is so honed in that you don't even get annoyed with her constant own horn tootage.

Dude, shes talking about herself again, and she's such an Onanana, I want to walk away, but she's hilarious

by Jpmfjones March 15, 2024

Onivalhidreterofobia

Fear of riding in a full 2-decker bus on a wet road next to a 90-meter-high hydroelectric plant.

Medo de andar em um ônibus de 2 andares cheio numa estrada molhada ao lado de uma hidrelétrica de 90 metros de altura.

Oh, I have onivalhidreterofobia! Help me!

Oh, eu tenho onivalhidreterofobia! Me ajude!

by Gyuutaroou March 22, 2024

onabajo

it means hairy poosay

person 1: hey im lucy onabajo
person 2: wow yk ur surname means hairy poosay
person 1:wow interesting!

by eldjdmdksjajndmfjf_3938 June 23, 2024

Onalaska, TX

Some bum ass town in the middle of Lake Livingston. Sitting between Coldspring and Livingston, Texas, Onalaska is filled with miserable assholes and Coke addicts.

Joe: "Hey man, how was your time in Onalaska, TX"
Mike: "I want to kill myself"

by I_like_IndieMusic May 4, 2025

Onata incident

At one time, in the South Korea, there was a rumor that if students had the S-shaped emblem, they could go to a prestigious university (Seoul National University), and if they had the letter III, they could get a score of 300 on the College Scholastic Ability Test, which led to the Onata incident in which test takers secretly removed the Sonata III emblem. Therefore, there were many Sonata IIIs with the letters S and III missing from the emblem and for this reason, Hyundai Motors implemented a free emblem replacement service.

During the Onata incident, students were so desperate to hide the missing S-shaped emblem from their Hyundai Sonata III that they started arriving at the test center with blank emblems just to avoid suspicion!

by Emotional Cruiser November 13, 2025