A person who people think is dumb just because they have muscles. However the weaker people in society have no idea what kind of training and knowledge it takes to become a master physical specimen. Many weaker people say that meatheads are obbsessed with their muscles. Obsession is a word that the lazy use to describe the dedicated.
Meathead= a highly dedicated and smart person who looks for a healthier lifestyle than the fastfood eating video gaming losers that wear their sisters pants.
Examples of meathead. Police officers, Firefighters, Military, EMT's, Athletes of all kinds, Personal trainers.
by Smartmeathead January 31, 2011
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In the gym, a meathead is the guy who only does mirror exercises and looks at himself frequently to see his development (imaginary or real). A mirror exercise is for a muscle that you see when you look in the mirror. These are chest, biceps and abdominals, and nothing else.
Go to any gym and you will see lots of guys (meatheads) like this. Hint: They are always in front of the mirrors.
by idiom police October 27, 2011
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Rugby Players...of the chav variety. Usually come in all shapes and sizes, and each others assholes. Muscle grows where no man can grow muscle, replacing brain tissue with muscle tissue. Usually taking on the accent similar to a plymouthian or plymptonite, with phrases such as "'ere fock" and "ya cont" which strangely enough translates as "Here Fuck" and "You Cunt." These apes....sorry rugby players are consistently fucking around, and trying to sleaze younger girls (usually aged between 19 and 12) Not only are these meatheads complete tossers, they also have minions (also known as little bitches) who think that they are powerful due to there large ameoba-likr rugby players
IVYBRIDGE COMMUNITY COLLEGE RUGBY MEATS!

Tom Arscott, Aaron Croukshanks, Ben Hooper, Baz, and all the other tossers doing BTEC at Ivybridge Community College.
by Mr Collins May 7, 2005
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Meathead is the common name for a species that is believed to be the evolutionary deadend from cross-breeding between chimpanzees and neanderthals. Meatheads may be identified by their physical traits which include abnormally large upper torso and especially large biceps (or “guns”) and low mental capacity. They may be observed in their natural environment "the gym" and typically congregate around squat racks and dumbells. They are often observed carrying gallon jugs of water and protein bars and/or shakes. It is highly recommended to speak slowly, using the most basic vocabulary when conversing with a Meathead.
Meathead1: "Have you tried the new protein powder? It has 51g per serving!!"

Meathead2: "Have you tried the new protein bar? It has 25g of protein!"
by weezy12 March 6, 2013
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A person who achieves greatness through self-motivation, dedication and knowledge of the bodybuilding art. They are looked down upon by the weaker willed, excuse ridden, unmotivated scum of the Earth. A meathead strives to prove the power of the human body and potential dedication of the human mind. They do not demand respect; they earn it.
Landia Whales - "Look at those stupid meatheads"
Everyone else - "They looking dedicated, thick, solid and tight. It seems like they smart enough to understand the basics of nutrition, so who is stupid now?"
by mirin_zues_son August 29, 2012
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A person who acts like an idiot or otherwise incompetent person. They usually do things to try to fit in, but do them wrong. Meatheads also have weird habits that they think are normal, but really aren't. Meatheads are generally slow (mentally) and are obnoxious, and sometimes try to act like experts in areas that are usually unimportant (such as racoon behavior or other such oddities). A synonym for meathead is idiot.
(Guy tries going off a jump, and falls)
Steve: Dude, that guy's such a fucking meathead (referring to guy who fell).
Greg: Yeah, he can't even ride a bike.
Guy: Did you see that! I almost made it!
Steve + Greg: Yeah beat it, you fucking meat!
by scmar August 12, 2007
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a major doucher(s) who gets an erecjion from lifting heavy weight, drinking mad protein shakes, and injecting steriods up their friends asses. These men also enjoy checking eachother out and often have circle jerk congregations with fellow meathead douchers.
David says, "Why does Axel have an boner...?"
Dan says, "He's a meathead... him and his meathead friends get off when they drink protein shakes and lift heavy weight together."
by Raey-Dale March 21, 2009
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