傑作 けっさく
kessaku

Noun

1. masterpiece; masterwork; chef d'oeuvre; fine piece of work

その偉大 いだい画家 がか傑作 けっさく かべにさかさまにかかっているを 、彼 かれ おどろいた。
sono idaina gakano kessakuga kabeni sakasamani kakatte iruo mite karewa odoroita.
He was surprised to find the great artist's masterpiece hung on the wall upside down.
Noun
na-Adjective

2. (unintentionally) hilarious; absurd (e.g. blunder); outrageous; wild

Jocular
Dated
わははは!そりゃ傑作 けっさくだ!
wawawawa! sorya kessakuda!
A-ha-ha-ha! What a blunder!