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1.
A substitute for "hella", meaning "really" "alot".
OH SNAP! That's GRIPA tight!
by The Vorsh July 16, 2004
 
2.
gripa is the combination of the slang terms hella (associated with northern californians) and grip (associated with southern californians). they both mean "really" "very" "abundant".
There's gripa people!
by KJ Ngan March 25, 2006