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"
"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"
by picklepickler December 04, 2024