હસવું ને હાણુ.

hasavuṁ nē hāṇu.

Literally: Laughter and loss.
What it means: Excessive joking or frivolous behavior often leads to damage, regret, or conflict.

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.