Dossilmite Share definition Flag A dossilmite is an insult for someone who is an imbecile. Little Susie spilled the carton of Soya Milk and her Mum raged: "You stupid Dossilmite!" Dossilmite by Sir Alex Ferguson April 29, 2003 0 0 Get merch Get the Dossilmite mug. Buy Now — $32.95 See more merch