My younger brother (who doesn't even like rock 'n' roll) heard the line in the chorus of "Suffragette City" as "Don't lean on me man, 'cause you can't afford the chickens..." (real: "ticket"). This seems to be a common one, but earlier in the song he'd also heard "The smell of fried chicken put my spine out of place." (real: "this mellow-thighed chick".) He still calls it the chicken song.
A childhood belief about misheard lyrics

others believed things like this
- I thought that the song "Built this City" by starship went as follows. "Milk and Cereal, Rock and Roll"Anon
- I heard the song about Heaven being a place where nothing ever happened and thought, "What a boring place."Anon
- i used to believe that Chicken McNuggets come from baby chickens.— Micky D =)
- I swear I heard a Disney Channel/Radio Disney song where the chorus was a repeated “Damn it”— SpengBab
- I used to believe that if you buried a chicken bone in the backyard it would grow a chickenAnon
- When I caught chicken pox, I thought it was down to me eating too much chicken.— Helen