ONB

Old news B. Used to express disappointment in someone that posts something in a group chat that has already been reported. The “b” is just a term used to refer to a friend. It does not stand for anything.

Person 1: wow. Pistons just got the first overall pick in the lottery!
…. moments later…..
Person 2: Pistons just won the lottery!
Person 1: ONB
Person 2: Damn, b. You got me.

by DJRITM December 4, 2021

Onb

- Onb is a commonly used slang term that means “On Brian” which refers to the legend, Brian Stenke.

- used to swear upon Brian Stenke’s name that something is factual and true

Onb I just went on a mission trip

by Jawsh86 July 16, 2022

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.

by MDags August 4, 2015

ONB (On baby)

Term to describe whole honesty on a opinion or a statement.

If a lie, a random baby from Uganda DIES.

A downgraded term for ONG (on god)

I swear i didn't eat it! ONB (On baby)

by josephat a-u November 23, 2022

Onbe

Cool, mesmerizing, or impactful

Damn, that was so onbe of Timmy to give me his pet giraffe

by Cyrus Meier December 29, 2023

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

by Budder-boi June 29, 2023

onb

Short for "Obnoxious Nigger Behaviour"

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

by onbkiller December 5, 2024