This is actually my stepsister's but well here it goes:
She used to think that in that song "Drity Deeds Done Dirt Cheep"(i dont know the actual song title but thoes are the lyrics that she mixed up)that they were saying "thirty deeds and a thunder chick". One day we were sitting in a CHURCH parking lot waiting to meet someone to go out to eat and we were listing to that song. She sang almost all of the lyrics and when it got to that part she sang it as she thought it was. My mother and myself could hardly contain our laughter.
A childhood belief about misheard lyrics

others believed things like this
- a friend thought that the song "dirty deeds done dirt cheap" was saying "dirty deeds dunderchief"— dubs
- when i was younger i thought ac/dc's dirty deeds (done dirt cheap), was dirty knees and the thunder cheeks.— S
- i thought I got one year older when my family sang the birthday song.— I am the ghost
- for my little sis -
Paul McCarty song "Band on the Run" but when she sang it it was "Man has the Runs"Anon - I used to think that the actors on tv shows sang the show's theme song.Anon
- My mum always thought the lyrics to macy grays song was i try to say goodbye to my chook.— alana