Wrong lyrics to a song, "Faith" by "George Michael.
I heard:
Oooooh, you gotta half-faint.....you gotta half-faint a faint a faint.
(Oooooh, you gotta have faith, ... you gotta have faith a faith a faith.)...
A childhood belief about misheard lyrics

others believed things like this
- I used to believe that your belly button was what held your top half to your bottom half...— Debelouwho
- i thaught the michael jackson song billy jean song said Janet's not my son Anon
- An hour and a half is exactly the same as half an hourAnon
- I used to think you could die if you jumped half way down the stairs. Anon
- i used to believe that if there were bombings, that the world will split in half.. — kins
- when I was 6 years old i use to believe a catfish was half cat one fish.Anon