expression, i-adjective
Colloquial expression meaning someone is not intelligent or slow-witted. Often used in casual, sometimes blunt, contexts. The antonym is 頭が良い.
See also: 頭の悪い
Antonyms: 頭が良い
彼は頭が悪いから、説明してもわからないかもしれない。
He's not very bright, so he might not understand even if you explain it.
あの子は頭が悪いわけじゃない。ただ勉強が嫌いなだけだ。
That kid isn't dumb; he just hates studying.
Antonym meaning 'smart' or 'intelligent'. 頭が悪い is the negative counterpart.
A stronger, more direct insult meaning 'fool' or 'idiot'. 頭が悪い is less harsh and describes ability rather than name-calling.
Phrase composed of 頭 (head) + が (subject marker) + 悪い (bad). Literally 'head is bad', idiomatically meaning 'unintelligent'.