A mental handicapped person (or window licker ). They wear bright luminous crash helmets so they are easily recognisable and do not stray too far from their spaz wagon. Helmet also helps in event of multiple spasms, fits or collisions with lamp posts.
"Hey Johnny, look at those helmet heads chasing the ducks."
by mtotheo November 07, 2003
A sexy fat voluptuous young woman who has a helmet for a head who are intellectually far superior than most geeks and have the ability to attract any dweeb towards them.
I heard he is in love with this chick from his Math tutorials , but dude she is a total Helmet Head.
by Thenoogmegzator1337 April 28, 2011
A hair cut that forms a perfect "helmet" shape around the head itself. Many times this can be accomplished by a horrible haircut and lack of caring in the morning tossed with a side of being a boner. This non-trendy look is usually seen on people with the name "Mike".
"Man, Mike walked in this morning with some crazy helmet head! Die it pink and he'd look like a penis!!"
by TweederBSU November 14, 2007