UUUUUUUUUH Share definition Flag is a person that is fapping and at the end he says uuuuuuuuuuuuuuuuh fftlftlftl the person kim screams UUUUUUUUUHuuuuuuuuuuuuuuuuh when he just took a fap UUUUUUUUUH by Barre Jarre December 7, 2012 0 0 Get merch Get the UUUUUUUUUH mug. Buy Now — $32.95 See more merch