Green’s Dictionary of Slang

(US black) a hairstyle in which black hair is straightened, then brushed to one side in a manner loosely resembling the hairstyles of John F. Kennedy (1917–63) and Robert Kennedy (1925–68).

1980

E. Folb Runnin’ Down Some Lines 244: Kennedy swoop Hair style emulating that of the Kennedys, straightened and combed to the side.