Extremely extreme, and/or viciously intense.
NOTE: “Whippin’” is technically an informal pronunciation of the
word “whipping”, but no way would anyone ever say whipping when they meant whippin’. That'd just sound silly. Plus, the
word whippin’ is only used when one is excited as all heck, and in that state it's nigh
impossible to say it with an ‘ing’ at the end.
“Whoa, you musta been so passed out. Cuz dude, that last band was like whippin’ loud!”
“That
chick was
gnarly-
fast. Did you see her calves? They were whippin’ huge!