stiffy sender Share definition Flag S.P. A person who sends stiffy's to their best friends boyrfriend whilst on holiday in the Ardeche. S.P. sending a massive stiffy to Dr Beer. Phillay says Sarah your such a stiffy sender. stiffy sender by G Jackson June 25, 2009 0 0 Get merch Get the stiffy sender mug. Buy Now — $32.95 See more merch
