[JusPasenThru]

I’m hanging in there like hair in a biscuit.

I’m hanging in there like boogers on a doorknob.

I been run hard and put away wet.

Boy, your so skinny when you stick your tongue out and turn sideways you look like a zipper.

[davetex]

Hanging in there like a loose tooth in a hockey player.

[boatbums]

He’s so skinny, he only has one stripe on his pajamas.