Not just a kind of music. Rock and Roll is also an adjective and an adverb.

Example:
as an adjective
Iggy, those are some rock and roll shoes you’ve got on!” (Iggy’s shoes are kick-ass).

as an adverb
Iggy, are we going to the party?”
Rock and roll!” (yes)

NOTE: It’s said more like “rockenroll” than “rock . . . and . . . roll.”