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1) To think extremely irrationally as a result of being horny.

Dick thinking frequently leads to moronic behavior. This is primarily present in men, although a minority of women will experience this. A myriad of stupid behavior men engage in can be explained by this phenomenon.
John(horny): Well, my ex-girlfriend Lisa called. She asked if I would drive 300 miles to feed her cat over my vacation. I think its a good idea, maybe she'll put out.

Rob: What are you fucking nuts? You're dick thinking man! This broad's got a boyfriend and has been rejecting you for years.

John: Okay I won't feed the cat. Thanks for stopping me, I was dick thinking for sure.
by Limit5311 January 03, 2012
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