Lousy Owl

On the surface a good person, but underneath there's a dark side that's been repressed and is just waiting to come out. Usually from disagreement, or from alcohol, these people will turn from friendly to hateful and spiteful at the drop of a hat.

The kind of person that you can't believe beats his wife, that guy you don't drink with anymore, if you disagree in the slightest they become a very mean and spiteful person.

"Hoss is a great guy for the most part, but there's a lousy owl lurks in him."
"Watch out with them, that's a group of lousy owls"