1. A particularly nasty piece of work. A real jackass. Someone you’d rather beat with a brick until they stop twitching then interact with. Not a nice chap by any means.
2. A jocular way to compliment your friend. Sly, sneaky, clever. Works with Magnificent Bastard as well
A despicable person.
Someone easy to hate, usually for a good reason.
It is normally related to either extreme personality flaws or actions commited counter to human decency.
"What kind of rat bastard psychotic would play that song right now, at this moment?"
- Raoul Duke (HST)
A supposed human who is actually lower that a human being, but to make things worse, is able to pretend to be a human being. Someone who'd likely steal from his own brothers and suck up to his in-laws
That Rat Bastard PW sucks his stupidmother-in-laws ass while never visiting his own momma