Omni Sp Share definition Flag A derogatory term used to insult someone's over-consumption of high cholesterol, high fat, and/or unhealthy foods. Dude, that's your tenth KFC box meal this morning, are you turning into Omni Sp? Omni Sp by [A]Ray January 10, 2009 0 0 Get merch Get the Omni Sp mug. Buy Now — $32.95 See more merch