OK no rib-ticklers allowed here, only groans.

Here's some to start you off:

Two pelicans were standing by a river. One said to the other "that's a good fish you've got there". The other replied "Well, it fits the bill"

Why couldn't the pony call for help? Because it was a little horse.

Why couldn't the bicycle stand up by itself? It was two tired.

Who put the cat out? I didn't know it was on fire.

Did you hear about the Italian Chef that died? He pasta way.

Milk is the fastest liquid on earth: its pasteurized before you even see it