Cat's got the weasels,
The weasels, the weasels,
Cats got the weasels,
The weasel's got the cats.

Contributor says at their primary school this was sung in a group while performing a complicated dance. Anyone out of step at the end had to remove an item of clothing . . . Then, of course, it got banned.

(ed: I've said it before, and I'll say it again... I went to the wrong school!!)