ONB 

Outward Nose Breath.

This expression conveys humor in the same manner as LOL, but attempts to provide a more realistic representation of enjoyment considering that LOL is mis-used when one doesn't literally laugh out loud.

Nice meme you sent me Bob; it made me ONB.

ONB by MDags August 4, 2015

onb 

simply means "one night blow" =

see that guy over there, he was an onb.

onb by sexyjbl June 9, 2009

onb 

on baby

that’s drip onb

onb by gryzl July 28, 2022

Onb 

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

Onb by Budder-boi June 29, 2023

onb 

Short for "Obnoxious Nigger Behaviour"

"Jake is such an onb, always listening to shitty rap."

onb by onbkiller December 5, 2024

onb 

similar to on god, “on bad”

“i hate when it’s raining.”
“onb”

onb by coddue June 14, 2024

onb 

On Bob. For when you want to put something on Bob.

"I mean it, onb!"
"Who's Bob?"
"Bob"

onb by realbob24 July 2, 2024