bobble head 

A person, usually a student or a lower position employee, who always blatantly shows agreement with their teacher or superior by constantly nodding their head when in the presence of their colleagues for the purpose of getting recognition or acknowledgement just for staying awake (no matter if actual agreement can be or is felt). This perpetual motion, which commonly plagues gunners, is often combined with furtive glances at fellow colleagues to help build own self-esteem in the sense that others don't seem as interested in the lackluster drivel coming out of the boss's mouth. This is one of the most implicit ways of kissing ass, though easily observed in places like medical schools and probably board meetings. In other words, where fear-driven type-A individuals are spawned.

In pathology small group:

Dude: What's wrong with that guy's neck?

Chick: Nothing. He's just a bobble head, but he'll get a good recommendation for solid eye contact.

Dude: What a tool.

bobble head by lobo_the_hobo April 1, 2009

Knock it on the head

Used if a prior arrangement is terminated by either party usually due to laziness, a lack of interest or tiredness.
Turn it in

Joe - "You still wanna go to the club tonight?"
Pete - "Nah, knock it on the head mate, im too tired!"

Knock it on the head by Wibbsy October 3, 2003

to the head 

v. Doing somthing that would normally be done with multiple people on your own.

Timmy smoked a blunt to the head.

to the head by Jimmathey August 10, 2006

five head

a very large forehead

I banged this chic last night with a five head so big you could show movies on it.

five head by Copie Boy November 4, 2002

Orange Head

Account on Yelp.com that does not have a photo associated with it, resulting in the default photo of an outline of a person (which is orange).

Person 1: You need a photo

Person 2: I'm working on it!

Person 1: You're a total orange head right now, you know that, right?

Person 2: I put up a picture... happy?

Person 1: Very. Now write more so you can be elite.

Orange Head by Jen H December 16, 2008

Water Head 

A person with mental health problems, ie downs syndrome, or retard for the lay person.

Hey why do all the water heads work at McDonalds; Someone stop this water head from humping my leg; that effing water head just pooped his pants.

Water Head by The Ceeg October 26, 2006

base head 

Not just a coke addict, to correct some people on here. A base head is someone that smokes cocaine that has been cut with something, and sold as more, then passed to someone and they will cook it down with a few more ingredients to make it into a yellowish toned rock, known as "crack rock"

Jeff if a base head, he smokes a gram of rock a night.

base head by homelesshomey April 2, 2004