Assmow Share definition Flag A person who has their ass hair trimmed by another person in a proffessional setting such as a day spa. She spends at least $25.00 a month getting an assmow at her favorite day spa in south Hollywood. Assmow by Benzothegr8 July 10, 2010 0 0 Get merch Get the Assmow mug. Buy Now — $32.95 See more merch