When I first heard the Bon Jovi song You Give Love A Bad Name' i really believed they were singing 'Spatula Heart and your to blame, you give love to Batman'
Also our dad's version of the Joe Cocker/Jennifer Warnes song 'up where we belong' he sings 'No lift goes up where we belong' and he calls them 'Joe Cock up & Jennifer Wont'
A childhood belief about misheard lyrics

others believed things like this
- I used to believe that the lyrics to Bon Jovi's "You Give Love a Bad Name" were "You give love a Band-Aid".Anon
- I used to believe that the B-52's song "Love Shack" was actually "Love Shark!"— Natalie
- I used to think the song "love the one you're with" was called "love the one, your win. — Glowworm
- when I was a child I had never seen Jennifer Lopez written down so I thought her name was Jenny Ferlopez x)— Cath
- The song called heart of glass mixed me up as a kid. I heard "Heart and ass". — oops
- In Beyonce's song 'Crazy in Love', I always thought she said 'Daisy right now'.Anon