I was curious about the origin of the word 'mondegreen', and found this:

Oh, they have slain the Earl of Morray and Lady Mondegreen

The term mondegreen for misheard lyrics comes from this. It originated from Sylvia Wright's mishearing of the 'Oh, they have slain the Earl of Morray and laid him on the green' line from the Scottish folk song, 'The Bonny Earl Of Morray'.

Cited as examples of common mondegreens were the following:

"There's a bathroom on the right" ~Creedance Clearwater

"'Scuse me while i kiss this guy" ~Jimmy Hendrix

and

"The ants are my friends; they're blowing in the wind" ~PP&M

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Ipsa scientia potestas est ~Bacon