vader stamp 

The penis head aka the crown is said to look like Darth Vader's head. The Vader Stamp is the action of a man stamping a woman's head with the penis head.

Han Solo Vader stamped Leia during fellatio.

vader stamp by StopTheStamp December 13, 2014

Vadar Stamp 

When you take the tip of your penis and slap it across a persons face, it will leave a red mark in a shape reminiscent of Darth Vadars helmet.

After giving her a blind puppy, I decided she needed a Vadar Stamp.

Vadar Stamp by Horn December 5, 2013