હોશ ખાટા થઈ જાય તેવું કામ છે.

hōśa khāṭā thaī jāya tēvuṁ kāma chē.

Literally: It is a task that makes one's enthusiasm turn sour.
What it means: Said of a daunting or frustrating job that completely destroys one's desire or zeal.

ગુજરાતી કહેવતસંગ્રહ (Gujarati Kahevat Sangrah) (1921) · 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.