Greathead 

The mintest thing in the world, nothing can compare to a Greathead because it is just pure greatness. Nothing can alter its greatness whatsoever because it is 100% immortal and its beauty lies in the fact that it never grows old and will always remain beautiful and youthful until the end of time.

When is a leaf not a leaf? When it is just beautiful. Greathead is very much similar to this.

Greathead by William Oliver Sykes October 1, 2010

Greedhead 

Greedhead (noun): An avaricious person; a thieving, blood-lusting, & cash-hoarding elitist who gets off on making life more difficult for more people, usually economically or politically.

Hunter Thompson used greedhead often in his writing.

From Hunter S Thompson, "Stadium living in new age":

But what is Daniel Snyder really up to? Is he as stupid as a chicken on a freeway? Is he a natural fool?

No. The Redskins owner has been called many things -- from a treacherous greedhead to a savage jackass -- but he is rarely called a fool. Snyder is a high-rolling businessman in Washington D.C., the crossroads of power and politics in a nation of dangerously frustrated warriors who love football and hunger for personal Security.

Greedhead by Painted city March 13, 2013

Gearhead 

To have a tendency to want or to be interested in mechanical things; to understand, and be able to work on things of a mechanical nature, or things with gears.

That boy over at AutoZone is a total gearhead, he loves to work on his car.

Gearhead by PANDA <3 October 16, 2014

gearhead 

Someone who is totally into cars and is very knowledgeable about how to modify and fix them.

Eric is such a gearhead he has a seatbelt buckle for a belt buckle.

gearhead by ghost July 31, 2003

Greenhead 

A person who is an environmentalist.
One who respects nature.
A conservationalist.

Dude, look. he's digging in the trash..

No he's just pulling out aluminum cans, he's such a greenhead.

Greenhead by Greenhead Eddie February 1, 2009

Great Head 

To get extremely good fellatio/head

I got such great head last nite, I woke up this morning and had to pull the drapes out of my ass!

Great Head by exponentialhalitosis December 10, 2004

gearhead 

A person who is into all things motorized. This can be cars, motorcycles, machines, planes, or boats, but specifically relating to the engine and power delivery. Knowing how to weld and machine metal are also traits of a gearhead.

Dude, she's such a gearhead. Go show her that old lathe and tools in your grandfather's garage and she'll be in heaven.

gearhead by Analogworm January 14, 2008