One-Off Slut 

A woman who sleeps with a man after the first date (or first few dates)---and then spends the entire 'relationship' backtracking from the bed, trying to get to know the soul of a man---whose dick she has already had in her mouth.

As in: the equivalent of trying to switch on a lamp, without first plugging it in.

"John saw Mary as a One-Off Slut, because she dropped her panties for a few beers."

One-Off Slut by Nannette LaRee Hernandez March 16, 2018