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.
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.
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