મોંની દીવી જેવું.

mōṁnī dīvī jēvuṁ.

Literally: Like a lamp of the mouth.
What it means: Said of someone whose face lights up brightly or who speaks with remarkable openness and clarity.

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.