in which context 'jailhouse rocks' is used?

Answer 1

You see, in prison, prisoners dressed in stripped suits use sledge hammers to break up rocks. Ergo, jailhouse rocks.

Yeah, right.


Actually, it is a movie "Jailhouse Rock" (not rocks) with Elvis where he is in prison, and sings a lot of rock and roll music.

Answer 2

This was based on a song and film by Elvis Presley called 'Jailhouse Rock' about a singer who end up in jail and entertains the prisoners by singing Rock n Roll, hence Jailhouse Rock.