Sinistrous Mistress Share definition Flag A sexy, left-handed woman. Also known as a sinister sister. She's left-handed and a little bit sinister. She's a sinistrous mistress. Sinistrous Mistress by yo-yo-ma-ma March 22, 2011 0 0 Get merch Get the Sinistrous Mistress mug. Buy Now — $32.95 See more merch
