What is Vaders Helmet?
1.
The top of a penis
John whipped out his Vaders helmet
2.
Used to describe the head of a mans erect penis as it looks like Darth Vaders helmet.
Tim had just gotten vaders helmet in Melissa's ass when she started screaming "get it out!, get it out!"
See 
Random Words:
1. 
Sexual position in which a male inserts his testicles into a female's vagina and proceeds to masturbate until he ejaculates into he..