Stopout as a adjective describes a person (most likely a woman) who stays out all night with another. The kind of girl who leaves a club with a man and doesn't come home until some time the next day.
Mary turned to Janet and laughed, "Why you filthy little stopout... Did he cook ya breakfast?"
by butterface November 05, 2005
A woman of loose morals who will often start families with the sole intent of procuring accomodation for herself and her delightful halflings
Good Lord Molly - that scrubber has had 6 additional children since I last clapped eyes on her - the dirty little stopout
by alkie chris November 25, 2003