Back when the Catholic Mass was still in Latin and I was very young indeed, the Plainsong response "Et cum spiritu tuo" ("And with your spirit") was misheard and then missung by yours truly as "Evil spirits toots and true." When asked to explain it, I replied that I couldn't because I didn't know Latin. For a bit I had several members of the class singing it my way, too. Had I been left unchecked I could have changed the course of history!