Dictionary / Vocabulary / 頭が回らない
あたまがまわらない
muddleheaded; knowing no better; not thinking about
Also written 頭がまわらない
今日はどうも頭が回らないんだよ。
My brain doesn't seem to be working well today.
頭が回らないよ。
My brain isn't working.
暑さで頭が回らない。
My head is spinning because of the heat.