A sexual practice, most likely between two men, in which the goal is for the one to insert his actual head into the anus of the other. This is accomplished by the receiver having his spincter muscle severed by a knife, so his ass cheeks more or less flap apart. The giver then lubes up his shaven head and goes to town. It is uncertain whether this practice is supposed to be (more) pleasurable for the giver, or the receiver.
Raoul had to go to the doctor's to have his butt cheeks sewn back together after he was finished helmeting.
by Big D June 15, 2003
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A name given to a circumcised guy's penis. Or simply just a name given to a guy who has a circumcised penis. Used as the opposite of sock, i.e. an uncircumcised guy's penis.

This of course came about due to the obvious visual differences, i.e. a circumcised penis could appear to be wearing a helmet, whereas the extra skin on an uncircumcised penis kinda looks like a sock.
Curious Dude: "Hey man, question. Are you a helmet or a sock?"

Jewish Dude: "Holy crap, man, for the last time: I'm Jewish! Think about it."

Curious/Confused Dude: "What the hell, man? What's Judaism got to do with your package?"

Exasperated/Jewish Dude: "Oy!"
by Yorko February 26, 2008
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Another way to call someone stupid.
Person #1: See that guy who ran into that door?

Person #2: Yea what a helmet
by Mista Foldgers May 26, 2009
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a descriptive word used for a certain marijuana whos effects are so powerful that when after smoking an actual protective helmet is required to perform routine activities so one does not seriously injure his or her self
"Hey Willie would you like to go smoke this helmet with me?"

"Yo son hit this hemlmet."




by double digits 70 March 31, 2009
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the head of a penis also used to refer to those who are considered dorks, losers, nerds, or simply those who never get tail
Man, that dude's such a f****n helmet!
by giblets January 13, 2004
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