મણમાં આઠ પાંચશેરીની ભૂલ.

maṇamāṁ āṭha pāṁcaśērīnī bhūla.

Literally: An error of eight five-seers in a maund.
What it means: Said of a calculation or statement that is completely and utterly wrong from start to finish.

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.