Dirty Harry Potter 

after anal sex, the man takes his dick and draws a lightning bolt across the girl's forehead.

Joey's sick obsession with the adventures of Harry Potter drove him to perform a Dirty Harry Potter on Melissa.

Dirty Harry Potter by lakjsdksajd June 21, 2008

Dirty Harry Potter 

The vulva of any large mammal; e.g. a karibou

The diseased karibou gnawed in agony at its dirty harry potter.

Dirty Harry Potter by NimC May 22, 2009

Dirty Harry Potter 

A dimwitted perpetrator of domestic violence who beats his partner infrequently and secretly, so as her injuries seem to appear "like magic".

My mom's drinking buddy came over last night with bruises all over her face. Her husband must be a real Dirty Harry Potter.

Dirty Harry Potter by Feet_Febreze May 26, 2009

Dirty Harry Potter 

Toughest guy on the message board

A guy from Canada that doesn't take any shit

Dirty Harry Potter by Derek Elmore March 29, 2004