from The American Heritage® Dictionary of the English Language, 4th Edition
- n. Slang A stupid or dull person.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. An ungainly, dull or stupid person; someone who is lazy, disrespectful and/or whose beliefs and philosophies clash with another.
- n. A large, muscular, stupid male, especially an athlete. A jock. A brute.
- n. (Canada) a member of the Canadian Forces Military Police.
The term meathead is often credited as coming from the classic 1970s television situation comedy "All In The Family," wherein main character Archie Bunker (Carroll O'Connor) used the nickname to address his son-in-law, Michael Stivic (Rob Reiner). However, the word appeared in writing as early as 1863. (Wiktionary)