The Collaborative International Dictionary of English v.0.48:

Trollop \Trol"lop\, n. [From Troll to roll, to stroll; but cf.
   also Trull.]
   A stroller; a loiterer; esp., an idle, untidy woman; a
   slattern; a slut; a whore.
   [1913 Webster]

WordNet (r) 3.0 (2006):

trollop
    n 1: a dirty untidy woman [syn: slattern, slut, slovenly
         woman, trollop]
    2: a woman adulterer [syn: adulteress, fornicatress,
       hussy, jade, loose woman, slut, strumpet,
       trollop]