しめた

closed, shut, got it!, great!

→ しめる
verb · informal, past tense Rare #42,978
closed, shut Usually written 閉めた when it means “closed.”
JA: 窓をしめた。
EN: I closed the window.
got it!, great! An informal exclamation used when something works out well or you spot an opportunity.
JA: しめた!いい考えが浮かんだ。
EN: Great! I’ve got an idea.

窓の鍵しめた?

Did you lock the window?

しめた

Got it!

— 崖の上のポニョ (2008)

しめた!

Got it!

— 崖の上のポニョ (2008)

しめたぞ

Got it!

— Sanjuro (1962)