adjectival noun or quasi-adjective, noun

Humble language.
  1. poor, lame, ill-prepared.

Variations

Pronunciation Kanji Kana Is Common
 
お粗末 おそまつ
御粗末 おそまつ

Contained Kanji Breakdown

coarse, rough, rugged
ソ あら.い (8th, N1)
rice, USA, metre
ベイ こめ マイ (2nd, N3)
to divide
tree, wood
き モク こ- (1st, N5)
moreover, also, furthermore
か.つ ショ ソ (9th, N1)
month, moon
つき ゲツ ガツ (1st, N5)
one, one radical (no.1)
イチ いっ ひと- (1st, N5)
end, close, tip
マツ すえ バツ (4th, N3)
one, one radical (no.1)
イチ いっ ひと- (1st, N5)
tree, wood
き モク こ- (1st, N5)