When a sexual breeding machine fucks a bitch in her vagina while she in on her menstrial cycle without a condom......and intends to do it over and over again...
Though not a sexual breeding machine William fucked Paige in her apartment known as the Palasides on her period like 7 times and percieded to eat her out...which by default makes him a Nasty bastard.
by Bo Berry March 30, 2009
1 more definition
A canine that is particularly troublesome when trying to be forced into a car.
"You were having a bit of trouble getting that dog into the car the other night weren't you, right nasty bastard!"
by Andy Tiger May 25, 2005