The guy don't know a cow pie from a pizza pie.
Oh, Lord, he's put his foot in a cow pie again, metaphorically speaking.
"You look as if you just stepped barefoot in a cow pie."
It's nice not to have to watch out for cow pies.
It is also known in the American southeast and west as "cow pies".
We passed up one site because of cow pies.
I look like a cow pie in a bad wig.
There were cow pies, in the water and on the land.
It looked like a deformed drinking straw stuck into a cow pie.
And an old story about a frozen bird that fell in a warm cow pie.