mindfwap 

An exercise in mental masturbation, also known as a mindwank.

"John's going on about quantum physics again? Just ignore him- he's only mindfwapping."

mindfwap by Sqrrl101 September 20, 2005

mindfap 

Mindfap, to imagine fapping to the thought of having sex with a girl.

Theo mindfaps all the time, he has no chance of ever getting laid.

mindfap by lolmattgg September 16, 2010