The best thing to say when someone annoys you very much. Used to applaud one's stupid acts. Most commonly followed by the word, "asshat".
Random Driver 1 cuts off Random Driver 2.
Random Driver 2: Thank you very much. Yeah, Happy Fuck You Day, Asshat!!!
Random Driver 2: Thank you very much. Yeah, Happy Fuck You Day, Asshat!!!
by Nine December 17, 2004
Get the Happy Fuck You Daymug.