Suck Your Nan Share definition Flag To supple on ones grandmother. Popularized by United Kingdom gangsters and hip hop artists. Gangsta #1: Oi mate gimmie your phone. Gangsta #2 Suck your nan blud. Gangsta #1 Brap Blap Suck Your Nan by OhizzleSYN October 3, 2010 0 0 Get merch Get the Suck Your Nan mug. Buy Now — $32.95 See more merch