mondegreen
noun
noun: mondegreen; plural noun: mondegreens

1. a misunderstood or misinterpreted word or phrase resulting from a mishearing of the lyrics of a song

So my three most memorable mondegreens are these:
1) In The Beatles’ Lucy in the Sky with Diamonds, I thought the lyric was “The girl with colitis goes by.”
2) In Creedence Clearwater Revival’s Bad Moon Rising, I thought the lyric was “There’s a bathroom on the right.”
3) In Head East’s Never Been Any Reason, I thought the lyric was “Shave my wife, I’m going down for the last time.”  Which made more sense to me than the actual lyric.

N.P.: “Gott Maschine Vaterland” – Cephalgy