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An absolutely careless senseless clumsy fuck, incapable of following any instructions, usually breaking anything they lay their fat juicy 1 inch stubby fingers on. They are most likely to be weaing steal toe cap boots everywhere they go and are unable to tie up their laces due to the pure chunk of their fingers. D.T & motor vehicle are their key subjects at school although be careful that they don't clonk their heads on anything as the pure mass of their skull will smash anything in its path. You'll easily track them down as they leave a hot smell of cow shit everywhere they go.
Oi Bobby you meathead, what the fuck are you doing running in the D.T workshop.
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One derivation of this term comes from perception of society that people who devote large amounts of their time to lifting weights in the gym must not be very bright, due to the excessive nature of the weight-lifting activity. There is further perception that a bodybuilder or weightlifter has other serious shortcomings that result in him/her feeling the need to devote their lives to changing their body shape by rigorous exercise. Thus we call someone a meat head due to the assumption that their head is full of meat or muscle, and not brain tissue. Meathead is thus synonymous with stupid.
That guy is such a meat head.
by EricCP August 17, 2007
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Someone above average head, below average intelligence, spends a lot of their time looking in the mirror at their muscles,spends their free in the weight room, and grunts during reps.
Michael Parker was looking at his reflection while currling, when someone yelled hey meathead stop looking at yourself.
by n49333 October 02, 2008
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A derogatory term referring to a person who is dead from the neck up. Can be used as a noun or adjective.
That meathead president said nucular again.
by fredrickson May 17, 2005
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A meathead can be anyone of combo of the following things:

1. Someone who is muscular and slower in the brain.
2. Someone who marinates their head in sauce.
3. Someone who likes to put their heads in a grill of some kind (Ex. Barbeque, George Forman Grill, ect.)
4. Someone who is a complete fucking idiot.
A: Yo look at that guy, he's jacked!
B: Ya, but he's a fucking meathead though.

A: Why is that idiot grilling his own head?
B: Probably cause he's a fucking meathead.
by Rim Job Rob May 25, 2009
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