Synonymous: stoned, ripped, blunted. faded, lifted, whacked, blazed, baked, etc.
Smacked: When said person is only slightly stoned they would be referred to as smacked.
SupaSmacked: When someone is moderately stoned they would be referred to as supasmacked.
SupadupaSmacked: When someone is extremely stoned or ripped (not just a little, I'm talking blunted) they would be referred to as supadupa smacked.