hmpf Share definition Flag A sound uttered in disgust, sarcasm, irritation, or stubborness. "hmm" + "ffff" = "HMPF" (invented by C. Erickson) Sarah was irritated by the manner of her friends teasing, so she muttered an indifferent, "hmpf." hmpf by random-runner April 16, 2009 0 0 Get merch Get the hmpf mug. Buy Now — $32.95 See more merch