1. the top of a man's penis, or a hermaphodite's penis I guess as well. Also reffered to as a purple helmet.
2. A condom, as worn on the head of your penis, perhaps a more accurate term.
3. A kevlar, or plastic covering for your less important head, as worn while riding a motorcycle or visiting a construction site. Or oddly, enough, while exploring actual caverns. See spelunking.
Timmy, what have I told you about playing indoor sports without a helmet? Naughty boy!
by JamiSpoon May 24, 2003
Get the helmet mug.
To play the game of Helmet means to touch everything with the tip of your penis. i.e. - to go up to your friend's toothbrush and rub your penis tip on it. Gross? Yes. Amusing? Not really.
by don_jaun_dela_nooch_cw August 25, 2003
Get the helmet mug.
an individual who is in need of a helmet, for their mental capacity is so small that thoughts floating around can hurt their head, causing their brow to furrow. a slight tilting of the head is also common.
that guy over there is such a helmet. he told me that he would rather have the weekend in the middle of the week, because it would be nice to have a break.
by streetspirit January 23, 2003
Get the helmet mug.
To get so drunk that the only course of action is to strap the victim into a helmet so that he or she does not hurt themselves. Like, say if they had to go home on their own or they are constantly bumping into things.

Knee/elbow pads optional.
"fuckin hell Tina's sooooo drunk"
"i better go up to my room and get the gear... she's helmeted"
by rw17 January 5, 2007
Get the helmeted mug.
I was licking her mot and she was smoking me helmet.
by Bear January 23, 2003
Get the helmet mug.
The tip of a circumsises penis. More specifically, any male individual who behaves like one, especially one who acts in an aggressive manner.

"John's always flexing his muscles and trying to start fights. The guy's a real helmet."
by Atlas2 September 17, 2008
Get the helmet mug.
an often unappreciated and overlooked alternative rock band from the early to mid 1990s.
Helmet, sure put on a great show at the club last night!
by gus winslow August 13, 2003
Get the helmet mug.