planet head 

someone whos got a head shaped like a moon cresent especially the ones with the smiley faces who wear pajamas with a pom-pom on the hat piece.
they also seem to be really thick people that have eyes that dont concentrate.
looks like they have planets flying round there head.

look at planet head sitting on their own looking out the window with a bit of dribble

planet head by i ate all the pies June 24, 2004

plane head 

Getting a blow job on on board a plane, preferably inside the washroom followed by sex

We had mad sex after some plane head

plane head by James potter January 31, 2014

Head Plant 

A combination of head butt and face plant.

"The cat just head planted the door"

Head Plant by UrGeef July 17, 2018

planethead 

A person with a oversized abnormal head, a head that is not in proportion to the rest of the body. Some will think there is existence on there. This planet head can usualy be seen from outer space by the naked eye. A planet head usualy thinks he is right and is the most boring person you have met in your life.

Sam: Mate have seen the size of your head?? its like a planethead dude.

Timmy: Yeh i know its upsetting.

Sam: Mate shut up and boreoff you boring planetheaded cunt.

planethead by Dan Glee Balls September 13, 2008

planthead

someone who takes and grows druggs alot.

lmao look at that planthead.

planthead by kieron Jenkins February 6, 2007