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When a man or woman feels without a shadow of a doubt and only circumstantial evidence that they could have sexual relations with another person. Often referred to as Slam Dunk or "Tenant Thinking" former CIA Director.
Friend 1: Did you see the way that waitress reacts to me, she wants to bang me!

Friend 2: Dude, she brought you a coke that is some W THINKING.
by EPS August 04, 2005
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