rock and roll n.

"to dance to popular music with a strong beat," 1948 (in song title "We're gonna rock"), from rock (v.1) in an earlier blues slang sense of "cause to move with musical rhythm" (1922); often used at first with sexual overtones, as in the 1922 song title "My Man Rocks Me (with One Steady Roll)". The sense developed in early 1950s to "play or dance to rock and roll music." Also see rock (n.2). Related: Rocked; rocking.

In reference to music, by 1938 as "to have a rocking rhythm;" by 1977 as "exhibit the characteristics of rock music." To rock out "enjoy oneself to rock music" is by 1968. Rocksteady, Jamaican pop music style (precursor of reggae), is attested from 1969.

early 14c., rollen, "turn over and over, move by rotating" (intransitive); late 14c. in the transitive sense of "move (something) by turning it over and over;" from Old French roeller "roll, wheel round" (Modern French rouler), from Medieval Latin rotulare, from Latin rotula, diminutive of rota "wheel" (see rotary). Related: Rolled; rolling.

From c. 1400 as "wrap or cover by rolling or enclosing" in something, also "wrap round and round an axis;" early 15c. as "press or level with a roller." From 1510s as "to move or travel on wheels or by means of rolling." Of sounds (such as thunder) somehow suggestive of a rolling ball, 1590s; of a drum from 1680s.

Of spoken sounds, "to utter with vibrations of the tongue," by 1846. Of eyes, from late 14c. (rolle his eyne), originally suggestive of ferocity or madness. Of a movie camera, "to start filming," from 1938. Sense of "rob a stuporous drunk" is by 1873, from the action required to get to his pockets. To roll up "gather, congregate" is from 1861, originally Australian. To roll with the punches is a metaphor from boxing (1940). To roll them bones was old slang for "play at dice" (1929). Heads will roll is a Hitlerism:

If our movement is victorious there will be a revolutionary tribunal which will punish the crimes of November 1918. Then decapitated heads will roll in the sand. [1930]

1823, "action of rocking; a movement to and fro," from rock (v.1). As short for rock and roll, by 1957; but the sense of "musical rhythm characterized by a strong beat" is from 1946, in blues slang (Mezz Mezzrow, "Really the Blues"). Rock star is attested by 1966.