What are your favorite/most interesting sayings, aphorisms, metaphors, similes,etc.

A few beers short of a 6 pack.
Couple of sandwiches short of a picnic.
If brains were dynamite he couldn't blow his nose.
His elevator doesn't go to the top floor.
A few fries short of a Happy Meal.
She's a mutt.
Don't sweat the petty things, don't pet the sweaty things (George Carlin)
She could suck a golf ball through a garden hose.