Omg Twins Share definition Flag It's what you say to someone when you are freakishly twin like. You can say it if you're wearing the same outfit, say the same thing, etc. We both have crispy hair...Omg Twins! Omg Twins by Sadester May 30, 2006 0 0 Get merch Get the Omg Twins mug. Buy Now — $32.95 See more merch