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Someone that shows their true age through various actions, styles, and language. Everyone has at least one family member with ONK. This is not to be confused with the term UNC. This is known as having Old-Nigga-Knees.
"Damn that nigga got ONK!"

"My grandpa fell down the stairs last night— I told that nigga he had ONK bro"
"If you wear jean shorts that hit mid-calf you have ONK"
ONK by picklepickler December 3, 2024
Related Words
Onkar onk onky onkey onkel Onkelgriff onkers onket Onkher Onkieh
Stands for: On Kimani
Can be used to lie about something in a funny manner when its obvious you're lying and have complete disregard for the life of anyone with the name Kimani.
onk by telegr4m December 24, 2024
"In/On Kontrol" means you are in control of something or a situation.
OnK, I am OnK, "You OnK?"
OnK by AlwaysOnK December 9, 2025

The Angry Onk 

When i women gives a man a blow job and begins to make an onking sound as the guys cock is in her mouth.
"she was giving my the angry onk"
The Angry Onk by Cynthiasquirter February 2, 2009
he's all like 'KONO DIA DO IM JOSOPHEH JOELTIERS!' and is in a relationship with your Indonesian girlfriend, hes a fan of the beatles, and is a dumbass, he wears ugly.
unknown_waves is my boyfriend- jamie
EARLY ONK by byodde February 27, 2022
When you misheard your friend say “On God
Onkay
Onkay by Kimbruh July 5, 2021