expression, i-adjective
nasty; mean-spirited; of bad character
Describes a person's inherent nature or behavior as unpleasant, ill-natured, or malicious. Often used in casual speech.
See also: たち
あの人はタチ悪いから、あまり関わらないほうがいいよ。
That person is nasty, so you'd better not get too involved.
彼の冗談はいつもタチ悪い。
His jokes are always mean-spirited.
Compound of たち (nature, character) and 悪い (bad). The reading たち for 'nature' is often written in katakana as タチ to distinguish it from other homophones.