Short for "Obnoxious Nigger Behaviour"
"Jake is such an onb, always listening to shitty rap."
An abbreviation of on Budder originating in a cult worshiping budder(the way that most southern people say Butter) made up of several high school students. This means the same thing as Ong
Person 1: she’s fine af
Person 2: Onb bro
Cool, mesmerizing, or impactful
Damn, that was so onbe of Timmy to give me his pet giraffe