tough cookie
自分の意思がしっかりした人、(心が強い人)
主に女性に使うっぽい
Ex
- She’s a tough cookie!
Reference source
- https://ejje.weblio.jp/content/tough+cookie
- https://www.collinsdictionary.com/dictionary/english/tough-cookie
- http://getreadyforpmp.blogspot.com/2013/08/shes-tough-cookie.html
- http://askshigeko.com/article/よく聞く表現3:tough-cookie