どうする気だ

what are you planning to do?

→ どう
phrase Rare #23,849
what are you planning to do? A blunt, often confrontational way to ask about someone's intentions or next move. The subject is usually understood from context; だ makes it informal and direct.
JA: こんな大きな問題を起こして、これからどうする気だ?
EN: After causing such a big problem, what are you planning to do now?

前に計画があると言ったどうする気だ

You said before that you had a plan. What are you going to do?

— パラサイト 半地下の家族 (2019)

ダニエルどうする気だ

Daniel, what are you planning to do?

— TAXi (1998)

ヤツはどうする気だ

What is that guy planning to do?

— エリート・スクワッド (2007)

ベルリーニ行くなジーナどうする気だ

Bellini, don't go. What are you planning to do with Gina?

— 紅の豚 (1992)

どうする気だ

What are you planning to do?

— 炎628 (1985)

母親どうする気だ

What are you planning to do with my mother?

— サイコ (1960)

どうする気だ

What are you planning to do?

— アメリカン・ギャングスター (2007)