какой-то

some kind of; some; somewhat, in a way that is hard to specify

→ какой

phrase Very common #843

some kind of; some; somewhat, in a way that is hard to specify Changes form to agree with the noun it describes, but the exact form «какой-то» can also be used with masculine singular nouns. It may suggest that something seems unusual, unclear, or hard to identify.

RU: Том какой-то сам не свой в последние дни.

EN: Tom has seemed somehow unlike himself lately.

Вы какой-то другой.

You are somehow different.

Вы какой-то напряжённый.

You seem kind of tense.

Ну там был какой-то, мы решили забрать им ведь больше не надо.

Well, there was some kind of thing there, and we decided to take it since they didn’t need it anymore.

— Dead Man's Bluff (2005)

Том какой-то сам не свой в последние дни.

Tom hasn’t seemed himself lately.

Какой-то я слишком талантливый получился.