be on the case

US /bi ɑn ðə keɪs/
UK /bi ɑn ðə keɪs/
"be on the case" picture
1.

menguruskan masalah, menangani kes

to be investigating or dealing with a problem or situation

:
Don't worry about the missing documents, I'm on the case.
Jangan risau tentang dokumen yang hilang, saya sedang menguruskannya.
The detective assured them he would be on the case immediately.
Detektif itu memberi jaminan bahawa dia akan segera menguruskan kes itu.