Johnny Reb Share definition Flag Anal sex where the victim is caught off guard and unlubricated; similar to jabbing with a bayonet. I ran in, let out the Rebel Yell and gave her the ole' Johnny Reb before she could even turn around. Johnny Reb by Kyle and Derek August 22, 2006 0 0 Get merch Get the Johnny Reb mug. Buy Now — $32.95 See more merch