noun
wild party; revelry; uproarious banquet
Describes a lively, often disorderly celebration or feast, sometimes with a literary or dramatic tone.
昨夜のパーティーはまるで狂宴のようだった。
Last night's party was like a wild revelry.
彼らは夜通し狂宴を繰り広げた。
They carried on an uproarious banquet all night long.
Compound of 狂 (kyō, 'wild, crazy') and 宴 (en, 'banquet, feast'). The exact historical derivation is uncertain, but the kanji straightforwardly convey the meaning of a wild feast.