dong yiffer Share definition Flag To yiff or go through a sexual act with a penis of a furry Dong Yiffer: Hey I Yiffed My Fifth Dong! Friend: You need to cut down on the yiffing dong yiffer by Nympstraekaros November 4, 2015 0 0 Get merch Get the dong yiffer mug. Buy Now — $32.95 See more merch