Supa Sick Share definition Flag A word that means something is really spectacular or that person is very cool. Marina: Dude ! Did you meet the new girl ? Payton: lOl, yeah dude ! She's supa sick. Supa Sick by c4shm0n3ymar December 22, 2008 0 0 Get merch Get the Supa Sick mug. Buy Now — $32.95 See more merch