In my case I’ll say either Bloodhound Gang’s The Bad touch or Aqua’s Barbie Girl.
I mean… what the hell is “hanky panky”.
But for bonus points, I did also sing “take a walk on the wild side~” with no flying clue what “giving head” was supposed to be.
For some reason I Don’t Like Mondays was popular with my parents when I was a kid and I remember singing it sometimes. Turns out it’s about an actual school shooting and not just disliking Mondays.