American language is fluid — always changing.
Courtesy Comment:
Well actually I did not know the real meanings or where they originated for sure but looked them up.
I knew that they originated out of the black community.
Not all black slang of yesterday had the same inference to the depravity as used by todays black slang.
However, I do remember my principal in grade school telling us that rock and roll would be the down fall of America.
The jury's still out but since those days in America we have morally sunk to new lows with 43 million aborted/murdered on demand.
From Wikipedia;
The term “juke box” came into use in the United States in the 1930s, derived either from African-American slang “jook” meaning “dance” or from a name given to it by critics who said it would encourage criminal behavior, this came from the fake family name Juke.
Jazz
Jazz is an American musical art form which originated around the beginning of the 20th century in African American communities in the Southern United States from a confluence of African and European music traditions. The style's West African pedigree is evident in its use of blue notes, call-and-response, improvisation, polyrhythms, syncopation, and the swung note of ragtime.[1]
From its early development until the present, jazz has also incorporated music from 19th and 20th century American popular music, which is based on European music traditions.[2] The word jazz began as a West Coast slang term of uncertain derivation and was first used to refer to music in Chicago in about 1915; for the origin and history, see Jazz (word).
Rock and Roll
The immediate origins of rock and roll lie in the late 1940s and early 1950s through a mixing together of various popular musical genres of the time. These included gospel, folk music, and the blues - particularly the electric forms being developed in Memphis, Chicago, New Orleans, Texas, California, and elsewhere - piano-based boogie woogie, and jump blues, which were collectively becoming known as rhythm and blues. Also in the melting pot creating a new musical form were country and western music (including Western swing and influences from traditional Appalachian folk music), jazz, and gospel music.
The amplified electric guitar (developed by Les Paul, whose music I loved) turned every lamebrained pothead into a "musician" who didn't know music. Rock and roll was the end of the American Songbook and the end of the beauty of melody and harmony that enriched our lives. "Sex, Drugs and Rock and Roll" should be on our country's epitaph, if it is ever written.
Both “jazz” and “rock and roll” are sexual in origin. So much of American pop culture, including slang, comes from criminal enterprises. That would include carney slang that has made its way into popular language as well as NASCAR.
For a real shocker check out some cockney rhyming slang. It’s positively filthy.