Mondegreen
en.wikipedia.org
en.wikipedia.org
Hendrix used to make a play on it live sometimes where he would actually mime kissing his bass player during Purple Haze because of the frequent mishearing of "'scuse me while I kiss the sky" as "'scuse me while I kiss this guy".
That web page doesn't mention one of my personal favourites, which is in Kid Charlemange by Steeley Dan where the original lyric "Did you realise that you were a champion in their eyes?" is very widely (and incorrectly) believed to be the headscratching and nonsensical "Did you realise that you were Italian in their eyes?"[2]
[1] The original is the slightly less joyful "tryin' to make it pay".
[2] This was sampled/ripped off by Kanye West
France is bacon.
I have a recent example that had some Charli XCX listeners dismayed - in B2b she says took a long time building muscle up, breaking muscle down, repeating it but some listeners heard her say myself instead of muscle. It could be intentional in this case.
Charli XCX - B2b
NOTE: flashing black and white text that could trigger epilepsy https://youtube.com/watch?v=If4-ckGcr0c
I thought that's what golfers shouted when they got towards the end of the hole!