noun

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

adjectival noun or quasi-adjective, noun

Jocular, humorous term, messages.dated.
  1. (unintentionally) hilarious, absurd (e.g. blunder), outrageous, wild.

Variations

Pronunciation Kanji Kana Is Common
傑作 けっさく

Contained Kanji Breakdown

greatness, excellence
ケツ すぐ.れる すぐ (9th, N1)
human radical (no. 9)
measuring box
ケツ ます はりつけ (Kentei 1)
dancing radical (no. 136)
ブ セン まい (Kentei Pre-1)
evening
ゆう セキ ゆ (1st, N4)
sit or stand astride(跨) variant
tree, wood
き モク こ- (1st, N5)
make, production, prepare
サク つく.る サ (2nd, N4)
human radical (no. 9)
though, notwithstanding, while
サ サク -なが.ら (Kentei Pre-1)