Variations of two songs mentioned above:

Nobody likes me, everybody hates me, think I'll go eat worms
short fat juicy ones, big long skinny ones, see how they wiggle and squirm
First you bite the heads off, then you suck the juice out, then you throw the skins away
Nobody knows how we survive on worms three times a day

Jingle bells, Batman smells, Robin laid an egg
The Batmobile lost a wheel and the Joker got away