આવીને કુચા કરી નાંખ્યા છે.

āvīnē kucā karī nāṁkhyā chē.

Literally: He came and reduced it to pulp.
What it means: Said of someone who has completely ruined, destroyed, or made a mess of a task or situation.

Also said as

ગુજરાતી કહેવતસંગ્રહ (Gujarati Kahevat Sangrah) (1923) · read from the scan by machine — the Gujarati itself is unchecked · English is machine-made and nobody has checked it yet

Heard it differently, or know we've got the sense wrong? Tell us — that is exactly the kind of correction this needs.