Mental Masturbation

My definition of Mental Wanking reads like a medical affliction.

Main Entry:

men·tal mas·tur·ba·tion

mental stimulation, especially of one's own mind commonly resulting in time wasting. Can be achieved by missing the point or an acute lack of realism. More prevalent in certain fields, critics ( in particular literature ), software engineers, tv buffs etc. Can occasionally be accompanied by mental fantasies, arrogance, bad temper and or delusions.

For those looking for individual definitions of the word I took the following from Websters.