Initialism of British Board of Film Classification.

(Internet slang) Initialism of (I'll) be back in a few (minutes).

(text messaging, Internet slang) Initialism of be back in a few minutes.

(US, politics, finance, law) Initialism of balanced budget amendment. / Initialism of bachelor of business administration.

Initialism of best before end: used to indicate a use-by date at the end of a specified month

(biblical) Initialism of Bible in Basic English.

(role-playing games, video games) Initialism of big bad evil guy.

Initialism of bigger better deal: a potentially better romantic or sexual partner than one's current partner, for whom one may be on the lookout.

Initialism of British Best All-Rounder: an annual British cycle-racing competition.

Initialism of black, brown, indigenous, and (other) people of color.