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The ability to have an orgasm without any physical stimulation. Anyone can do it, male or female. Some can do it by deep-breathing. Most use their imagination. There's no cum but it feels just like an orgasm.
I just had a thinkoff, and it was amazing!
by blackbird101 July 20, 2010
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The ability to orgasm without sexual intercourse. As demonstrated on Strange Sex on OWN Network, it involves people lying on the floor, laughing or moaning, and flailing their arms and legs.
Person 1: Dude, I just totally think offed in class.

Person 2: I was wondering why you were moaning and hitting me in the face...
by I'm so confused February 25, 2012
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