Sentence:  By now a large crowd had gathered; when she learned the kid was dead a sobbing Deluvina Maxwell cursed Garrett and pounded his chest. “You <WSD>pisspot</WSD>!” she raged, “you sonofabitch!” 
Meaning of the word marked with <WSD> tags:  (pejorative) A  very unpleasant person, particularly a mean, nasty, or contemptible one.