I seen a feller and his pard, oh wait, never mind. That's daily conversation here on the fire. O.K., for real now.
He's got more balls than a three balled bull.
It's hotter than two rats screwin' in a wool sock.
She's so fat, walking away she looks like two hogs wrestling in a gunny sack.
He's dumber than a sack of hair (bucket of hammers, etc.)
If my dog looked like you, I'd shave his ass and teach him to walk backwards.