ボロクソ

na-adjective, noun

worthless; shitty; terrible

Strongly negative colloquial evaluation; often used with 言う to mean 'to badmouth' or 'to tear to pieces'. The literal components mean 'rags and shit', giving it a vulgar, emphatic tone.

• あの映えい画がはボロクソに言いわれてるね。

  That movie is being trashed, isn't it?

• 上じょう司しに企き画かくをボロクソにけなされた。

  My boss tore my proposal to shreds.

na-adjective, noun

disparaging; demeaning; insulting

Describes speech or attitude that is harshly critical and belittling. Often used adverbially as ボロクソに to modify verbs like 言う, 書く, 批判する.

• ネットでボロクソに書かかれて落おち込こんだ。

  I got depressed after being slammed online.