Odeigo Share definition Flag An individual with a huge and/or wide forehead. Also applied to someone with a receding hairline. Guy 1: KSI has the biggest forehead on Earth.Guy 2: Yeah, he's such an odeigo. Odeigo by Big Odeigo December 19, 2019 0 0 Get merch Get the Odeigo mug. Buy Now — $32.95 See more merch