Oomf Share definition Flag Oomf is the short term of "oun oun mor fab" in Khmer. Meaning: you are so pretty. Example: baby ooomf (oun oun mor fab) = baby you are so pretty. Oomf by Chrolloballz01 January 8, 2022 0 0 Get merch Get the Oomf mug. Buy Now — $32.95 See more merch