OTB means "Off The Board" and "Off-Track Betting." OTB is an abbreviation most commonly used in the US in a gambling context. It typically means "Off The Board" and "Off-Track Betting."

What does OTB mean in messages?

OTP is an abbreviation meaning "one true pair/pairing."

What is an OTB business?

Open-to-buy (OTB) is an inventory management system that works with your retail business. It's the amount of merchandise your retail store can buy during a certain time period.