On "This Ain't a Scene (it's an arms race)" by My Chemical Romance...
"This thing this thing it's a god damn arse face"
I knew this probably wasn't right but thought it was better than the real words. It also fits in with how the first line "I am an arms dealer" sounds like "I am an arse feeler".
A childhood belief about misheard lyrics

others believed things like this
- When my grandma was little, her dad would tell her that the freckles on her face and arms were fly crap.Anon
- I always hear Manic Street Preachers 'You Love Us' as 'You Love Arse'.— Lou
- i thought the line "saving my face" from the KT Tunstall song of the same name was "shaving my face"Anon
- We used to think that if you ran swinging your arms around, you would run faster. — Christine
- that if I flapped my arms hard enough, I could get airborne.— DeQuendre
- I used to think that 'testicles' was the word for the arms of a squid or an octopus. — Emily