bubble gum

[Mullins, Bill]

"bubble gum" -- OED has 1937 for confectionary sense


""Bubble Gum" Doesn't Bubble And Victims Are Angry."
Texas | Wichita Falls | Wichita Daily Times | 1911-11-07 p. 7 col 2.
"Citizens of Waukegan, Ill. are up in arms against a swindler who
visited their city some days ago and sold them "bubble gum." They assert
with great indignation that it does not "bubble" as the seller claimed."

and OED has 1969 for the music sense

"The Singing 'Mini-Mom' With a Big Family" By JUDY KLEMESRUD
New York Times; Aug 5, 1968; pg. 48 col 4.
"As a result, their detractors often call them the "Kool-Aid Kids" and
their music "Bubble Gum Rock". "