adjectival noun or quasi-adjective, noun

Messages.yoji.
  1. superficially polite but actually rude, rude under a veneer of politeness, courteous on the surface but insolent at heart.

Variations

Pronunciation Kanji Kana Is Common
慇懃無礼 いんぎんぶれい

Contained Kanji Breakdown

courtesy
イン (Kentei 1)
flourishing
イン アン さかん (Kentei 1)
pike, windy-again radical (no. 79)
シュ また ほこ (Kentei 1)
table, table enclosure, table or windy radical (no. 16)
キ きにょう (Kentei 1)
or again, furthermore, on the other hand
また ユウ やす (8th, N1)
heart, mind, spirit
こころ シン (2nd, N4)
courtesy
キン ゴン ねんごろ (Kentei 1)
diligence, become employed, serve
キン つと.める いそ.しむ (6th, N3)
the violet
すみれ キン (Kentei 1, N1)
grass, grass radical (no. 140)
one, one radical (no.1)
イチ いっ ひと- (1st, N5)
mouth
くち コウ ク (1st, N4)
life (生) variant
power, strength, strong
リョク ちから リキ (1st, N4)
three
サン み みっ.つ (1st, N5)
heart, mind, spirit
こころ シン (2nd, N4)
nothingness, none, ain't
ム ブ な.い (4th)
person(人) variant
40, forty
シュウ よんじゅう しじゅう
one, one radical (no.1)
イチ いっ ひと- (1st, N5)
fire, fire radical (no. 86)
ヒョウ カ
salute, bow, ceremony
レイ ライ れ (3rd, N3)
cult, showing radical (no. 113)
the latter, duplicate, strange
おと- オツ イツ (8th, N1)