B-side

noun — 2 senses

noun

The reverse side of a cassette tape or a phonograph record, especially a vinyl single, often containing songs not considered for airplay.

I wonder what is happening on the flip side of the world, / The side you never like to play / I know you say you need the A-side all the time / But the B-side, I just wonder what you say1972, Jim Peterik, “Flip Side”, performed by Ides of March:

Any song included on a compact disc single, besides the first song (the A-side).

Entry derived from the Wiktionary, under licence CC BY-SA 4.0 — list of authors.