hålligång

Etymology
+ (lit. hold (it) ongoing, approx. keep it up)

Noun

 * 1)  An act or instance of partying or merrymaking, especially one of good quality or when compared to one of inferior quality.
 * Festen började kanske trögt, men framåt midnatt så var det ett jävlans hålligång på dansgolvet!
 * The party may have begun slowly, but at midnight there was some helluva great partying on the dance floor!