drunken spree; drinking binge; alcoholic frenzy
Refers to a bout of heavy, disorderly drinking. The word is somewhat literary or old-fashioned; in modern casual speech, expressions like 飲み騒ぎ or どんちゃん騒ぎ are more common.
After a drunken spree, he collapsed on the street.
Some people have lost their families because of drinking binges.
Compound of 乱 (disorder, riot) and 酒 (alcohol, sake). The exact historical derivation is uncertain, but the word likely emerged in literary or formal contexts to describe excessive, unruly drinking.