From Nana Sullivan:
Pity the poor pelican. His beak can hold more than his belly can (on taking more food than you could eat)
And
The crow of a hen and the whistle of a woman wakes the devil from his lair. (My brothers were forbidden to teach me to whistle and to this day, I don't)

If you make that face and someone hits you on the back you'll be stuck that way.

Someone just walked on your grave. (If you got a shiver up your spine)

If you hit your mother, when they bury you, that hand will rise out of the grave. (I often tell this to Freddie the cat who will end up on his back with all four paws in the air.)