have your head screwed on (the right way)

US /hæv jʊər hɛd skruːd ɑn (ðə raɪt weɪ)/
UK /hæv jʊər hɛd skruːd ɑn (ðə raɪt weɪ)/
"have your head screwed on (the right way)" picture
1.

頭がしっかりしている, 分別がある

to be sensible and to have good judgment

:
She really has her head screwed on the right way; she always makes smart decisions.
彼女は本当に頭がしっかりしているので、いつも賢い決断をします。
You need to have your head screwed on if you want to succeed in this business.
このビジネスで成功したいなら、頭をしっかりさせる必要がある。