Sentence:  Whenever we'd be laying around late at night and we'd hear a toilet flush somewhere in the building, Mike would say “Uh, uh, there's one of them <WSD>mudkickers</WSD> again,” and he'd run up and chase them out, yelling “G'wan, you didn't pay no room rent around here, scat!" 
Meaning of the word marked with <WSD> tags:  Prostitute.