Bill D - 'Twas a thousand-leg-ged worm and he began to squirm, "Has anybody seen a leg of mine? If it can't be found, I'll have to look around for the other nine hundred ninety nine ... " has ten times as many verses as Ninety-nine Bottles of Beer. It would make more sense maybe to say "crawl around" or "walk around" than "look around", but "look" is the way I learned to sing the song. No, we never got to the end of it ...

Paul Burke - An even more repetitive song than "The Bear Went Over the Mountain" is "The once was a man called Michael Finnegan, He had whiskers on his chin-igan, Pulled them out and they grew in again, Poor Michael Finnegan - Begin Again. There once was a man ... ..."
I don't believe anyone sings twenty to forty verses of that song the way one would in a story-telling ballad such as Tam Lin (Child 39) and Gil Morice (Child 83).