The lyric was written that way, but was it really sung that way? He clearly ends that word with a "sh" sound.
Then of course, there is this line in the song:
- And little Early Pearly came by in his curly wurly and asked me if I needed a ride
often misheard by many as:
- And little Early Pearly gave my anus curly wurly and asked me if I needed a ride
Such a dirty song