https://www.thoughtco.com/what-is-a-mondegreen-1691401
A mondegreen is a word or phrase that results from mishearing or misinterpreting a statement or song lyric. Also known as an oronym.
The term mondegreen was coined in 1954 by American writer Sylvia Wright and popularized by San Francisco Chronicle columnist Jon Carroll. The term was inspired by "Lady Mondegreen," a misinterpretation of the line "hae laid him on the green" from the Scottish ballad "The Bonny Earl o Moray."