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2.
An annoyingly smart person.. a person who over-uses the spelling and grammar rules.
Fred: Hey, how's you?

Bob: Hi

Fred: Aint got no money today mate, sorry

Bob: I think you mean "I haven't got ANY money"

Fred: Wha?

Bob: Learn your spelling and grammar!

Fred: Shut it, spag head!!
by DizzyMoo March 20, 2008
 
1.
Spag head or spaghead is derived from "spaghetti head."

One who has many thoughts or ideas, personal or work related, running through one's mind.
She was a real spag head. She had alot on her mind and seemed to need a way to organize her thoughts and ideas.
by jestrex May 07, 2009