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NOUN. A nick name for marines. Originated from the "high and tight" haircuts that make their heads look like jars.

The derrogatory version means That your head is like an empty jar, thus meaning stupid.

Marines call each other jarheads, so it's okay to say it if your a marine or a friend of a marine.
Kind of like the word "nigga." niggas can say it, YOU CAN'T.
1.(marine)Once a jarhead,always a jarhead.

2.(derrogatory) Your about as confused as a jarhead fuckin' a football.

3.(nigga) Wassup, my jarhead?

OR Thats one a funny-ass jarhead, right there!
Jarhead by The Bugness December 31, 2010
Jarhead. Noun. Slang for Marine. Origin: from the resemblance to a jar of the regulation high and tight haircut. The Marine's head by implication, therefore, also a jar. An empty vessel.
That jarhead got himself blown up during his tour in Iraq.
jarhead by Sassygirl91 July 31, 2011
Related Words
1. A member of the United States Marine Corps
2. Great book, terrible movie
1. Don't call a Marine a "jarhead" if you are not a Marine yourself.
2. Man, Anthony Swofford's "Jarhead" is such a great book, too bad the movie sucked big, hairy balls.
Jarhead by jay-x April 29, 2008
Jarhead is a derogative term for US Marines based on the popular/common perception that they only follow orders and are incapable of individual thought as it is trained out of them in USMC basic.
Jarheads don't have to think. They only have to follow orders.
Jarhead by Loki124 October 11, 2008
Slang term for a US Marine comes from the resemblence of Marine Corps dress blue uniform to a mason jar, hence JAR HEAD. Sometimes considered derogatory, but commonly used amongst Marines.
Someone has to get killed let's send a jarhead or two
jarhead by sadoldshadow December 28, 2003
That guy who cussed you out must have been a jarhead.
jarhead by Light Joker January 19, 2007
The haircut style every motivated boot Marine gets on his 10 day leave transitioning from boot camp to SOI.
You must've a boot private or PFC huh? How can I tell? Jarhead, your cut is to hight and tight, it looks like the top of a heinz ketchup bottle. Unsat
Jarhead by Akumahund November 29, 2018