BBB.

A person who is not another's Main Squeeze. Worse than a mistress, a BBB is the back burner of the booty call options. Don't be humiliated by cheaters.

BBB. Back burner booty.
Definition. A person who is not another's Main Squeeze. Worse than a mistress, a BBB is the back burner of the booty call options. Don't be humiliated by cheaters.

Examples:

Don't let them make you a BBB.

You're better than a BBB.

My friend feels like a BBB.