A textbook for a human sexuality course.
I can't believe I just fell asleep reading my sextbook. You'd think it'd be more interesting...
by lady_so_divine July 15, 2011
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Vandalizing textbooks by drawing dirty pictures
Student 1:what are you doing to that textbook?
Student 2:drawing Ms. Van Dyke giving head
Student 1:oohh your making a sextbook
Student 2: all day
by Joey Phatoney June 1, 2011
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An appreciation of a very well performed action.

An extension of the classic "That was textbook", used only in situations where the action has been performed really, really well.
"That handbrake turn was sextbook"

"I very much appreciated that maneuvere on many levels and felt i needed to advertise my appreciation"
by King Bongo Berious September 1, 2005
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The equivalent of sexting but over facebook.
I almost went on a date with a guy who was into sextbooking last night. What a wanker!
by katygirrl January 18, 2011
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