Green’s Dictionary of Slang

(Aus./N.Z./US) a noisy, exciting party; a good time; thus ragey adj., exciting, boisterous.

1985		in Tracks (Aus.) Aug. 5: Sure, mate, everyone goes out [...] Everyone has a mega rage, but I think you just carried it too far.
1986		R. Beckett Dinkum Aussie Dict. 43: Rage: A sort of late-night perambulating party involving anyone from the sub-teen acne set through punks and dole-bludging hippies to Yuppies. Normally involves grog, the acceptable social drugs of the day and a little statutory fornication.
1989		R.G. Barrett Boys from Binjiwunyawunya 20: Warren [...] invited Les down to the Sheaf [...] for a bit of a rage.
1994		Sydney Morning Herald 12 Sept. Guide 18: Saturday 1.00. n.p.: Rage – Late-night music [GAW4].
2003		McGill Reed Dict. of N.Z. Sl. 169: rage Wild time or wild party, which can be ragey or a rage up.
2014		C. Eble (ed.) UNC-CH Campus Sl. Spring 2014 11: RAGER — a wild, crowded party with lots of dancing, alcohol, and drugs.