You're listening to an album by one of your favorite bands, and you can't help but notice that this one line (or phrase) has popped up before. Maybe it's from a song earlier in the album, or maybe it was from another album entirely (maybe it's even the title of another song) but the point is that the songwriter — for whatever reason — has recycled their lyrics.
Related to Arc Words
, Album Title Drop
, Author Catchphrase
, Lyrical Tic
, and Running Gag
. Often used in a Concept Album
. Not to be confused with Looped Lyrics