It is common knowledge that the etymology of term Rock 'n' Roll, is undoubtedly sexual. The rock refers to the good ol' va-et-vient, and the roll presumably a mid-mambo position change. Blues standard “My Baby Rocks Me with a Steady Roll” and Ray Brown's 1947 “Good Rockin' Tonight” were popular around the time when Alan Freed coined the term for the emerging style.

I wasn't aware, however, of the origins of the term Jazz, its sexual connotation, distinctly more pejorative. This might be explained by its link to Blackness or perhaps because the music had its origins in the finer New Orleans brothels that offered both sex and music.

Equally fascinating are the origins of the terms gig and jelly roll.