Top Definition
The combination of three words: guess, text, and book.

Rootword: guext

A term used to describe a textbook which one has never read, esp. for a final examination.
I don't need to read that thing! I have more knowledge than that guextbook up here!
*points to head*
#guext #textbook #guess #guetbook #know-it-all
by whywouldyouask December 17, 2010
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