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1.
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.
by c4shm0n3ymar December 21, 2008
 
2.
a super amazing person. an action that is thought to be impossible. something that blows you away
Robert Pattinson: did you see that new girl?

Leonardo DeCaprio: yea, marina? she's supa sick
by lodefat December 23, 2008