1 definition by Seiboobanigav

Top Definition

A dictionary that has only words relating to the practice of sexual intercourse.

"GUYS! I NEED TO DEFINE THIS WORD! WHERE'S THE FUCKTIONARY?!"

Or

Kid 1: "Guys, what's a clitoris?"
Everyone in the world: "GET THAT KID A FUCKTIONARY!"

by Seiboobanigav November 13, 2010

Buy a Fucktionary mug!