Siamese Beef Injection Share definition Flag The act of fornication with Siamese twins conjoined at the vagina. Dude I totally gave those bitches a Siamese Beef Injection last night! Siamese Beef Injection by beefinjection September 24, 2010 0 0 Get merch Get the Siamese Beef Injection mug. Buy Now — $32.95 See more merch
