OB

OB is a slang for Online Bitch

Them: I have three tabs open
Me: Aren't you an OB?
Them: yes lol

OB

Obnoxious Bitch!

Gabe, quit being such an OB!

OB

When you can see you have offended someone because of there reaction.

I could see I OB that person

ob

short for 'oh bullshit'
comes from nearly saying 'oh bullshit' to an authoritive figure.

"Steven, you will get detention for drawing on the blackboard."
"ob-"

OB

Short for Overweight Bastard(or Bitch). Pronounced like Obi. May be pluralized.

"Damn OB's are driving up the price of healthcare", or "That OB keeps staring at me while I'm eating and it's making me uncomfortable."

Ob

Faggot

Yo Ob Mad Faggot

Ob

A Guy who’s A Faggot

Yo i heard andres A Ob