Dick Lean is a condition caused by only wanking with one hand. For some reason the hand position with which you can generate most speed and power (which is also the most comfortable position) pushes your dick out to one side. Eventually your dick becomes noticeably lopsided.
look at that the masturbatone in his left arm compared to his right! he must have a massive dick lean.
by l3eck93 April 05, 2010