2) A woman who provides sexual favors to people she may or may not know, and does not demand money for her services;
3) A derogatory term implying loose morals, generally due to a violation of confidence.
4) A very scantily-clad woman.
"I can get some from Emma," said Rich, "she's a trollop."
I can't believe Courtney told everyone I like Ryan! What a trollop!
Could her skirt get any shorter? God, what a trollop!