Tougher than old boot leather!!
variant
Tougher than whang leather, (whang leather is slang term for sun baked rawhide, and that is tough, nearly approaching iron)
stronger than an hobnail in a boot. Not sure of the source, but one I heard around Apache, OK.
Meaner than a rabid skunk, (rabid pronounced raybeed)
Lazier than a toe lickin coon hound! (and that refers to a sore footed hunting dog, actually licking raw paw pads)
Slicker than turkey sh-t, (or goose) usually a reference to a condition of clayey mud rather than ice.
Madder than a wet badger!! (Badgers are mustilids related to wolverines, and are quite bad tempered normally, seeming even more so when wet. I saw one chase two grown men back into their pickup, and then he bit on the tires. When the men started the vehicle and backed away, he turned around and strutted away stiff legged in victory with his tail in the air.
variant, Madder than a old wet hen. (My grandmother's variant.)
It is a little known fact that in the olden days, America drove on the same side of the road as us but not wanting to copy what was going on in the old country no matter how successful it was they decided that on a particular day (4th. July I think!) all the cars would change over to the right, this was so successful that it was only a week later that they decided that all the trucks and buses should do the same! 
{Bad, I know, but I used to work with a bunch of people who loved to complain about anything and everything. 
}
Proud Military Family - Navy, Army, Coast Guard, National Guard 