A Slampig has pretty much summed up by the many definitions before this one. A slampig is a dirty whore who is good for only one thing...fucking. She is a piece of meat, no matter how big or small, no matter how ugly or hot. Bottom line...You fuck her and get the fuck out (but not before nutting somewhere on her body, preferably face).
A slampig can be identified by two whistles blown into a bottle pre or post ceding the word "Slampig!"
In a bar and two whore-ish dressed girls (possibly know sluts) walk past a group of guys. One guy blows two whistles into is Bud Light bottle and immediately follows with, "Slampigs!" The group of guys laugh hysterically.