A crusty, ill-tempered geezer or scrooge.
"The women should’ve answered back with, “We’d ask you the same thing, but everyone knows the answer to that, you curmudgeon ass coot.” - Dlisted
There is no sympathy for this devil. He is a diseased, candy-coated hunk of misery. You better grab your cowboy boots and walk from this cold hearted snake. Term coined by Country artist sensation, Carrie Underwood.