noun, na-adjective
bad taste; gaudiness; vulgarity
Refers to aesthetic or stylistic poor taste, often in fashion, decoration, or personal preferences.
彼のネクタイは悪趣味だ。
His tie is in bad taste.
あの派手な装飾は悪趣味だと思う。
I think that flashy decoration is gaudy.
noun, na-adjective
nastiness; perversity
Describes a person's character or behavior as nasty, mean-spirited, or perverse, often with a sense of moral repugnance.
彼の悪趣味な冗談にはうんざりだ。
I'm fed up with his nasty jokes.
そんな悪趣味な行動は許せない。
I can't forgive such perverse behavior.
下品 means 'vulgar' or 'crude' in a general sense, whereas 悪趣味 often implies a more deliberate or perverse bad taste.
Compound of 悪 (bad) and 趣味 (taste). The word is transparently derived from its components.