expression, i-adjective
muddleheaded; not thinking straight; brain not working
Describes a state where one's mind is sluggish, unable to think clearly, often due to tiredness, stress, or confusion. The affirmative form is 頭が回る.
See also: 頭が回る (あたまがまわる)
寝不足で頭が回らない。
I can't think straight because of lack of sleep.
緊張して頭
I was so nervous I couldn't think clearly.