Bumpy Helmet 

Having a grotesgue and disfigured head on the tip of a man's erect penis. It is caused by misuse and torture of one's cock. The bumpy helmet can cause a man to be off balance and fall over like a tethered bowling ball to your waist.

"Milton had a boner but due to his enormous bumpy helmet on the tip of his cock he lost his balance knocking Craig's reports off his desk."

Bumpy Helmet by Fergloch August 25, 2010

helmet bump 

When a female does cocaine off the head of a guys penisl

Erica was fiending for coke last night so she did a helmet bump off Tony's dick.

helmet bump by Nasim January 9, 2005