means Intense, overpowering anger — or, in slang, to celebrate or party with wild abandon.

from From Old French 'rage' (madness, fury), descending from Latin 'rabies' — yes, the same word for the disease, which literally meant 'madness' or 'frenzy.' That Latin root is possibly related to a Proto-Indo-European base suggesting violence or fury, the same family that gave us 'rabid.' So the word has always carried that animal edge: not mere irritation but something that takes you over, the way the disease overtakes a beast.