IHYF Share definition Flag IHYF is an abbreviation of the phrase "I hate your face." It is especially useful when you are totally careless about someone. What did you just say to me? OH...NO YOU DIDN'T IHYF IHYF by Jack Mehoff November 26, 2002 0 0 Get merch Get the IHYF mug. Buy Now — $32.95 See more merch