«مَا تِتْهَزِّيشِي مَا فِي الْوِسْطِ إِيشِي»

The speaker tells a woman to stop swaying and shimmying, because there is nothing at her waist to justify the display. The missing item is an ornamented belt hung with tassels, the finery that invites dancing; the jibe concerns this absent sash, not the body itself.

Though the verb addresses a woman, the saying is applied to anyone who is vain without grounds, deflating a self-satisfied person who parades before others while owning nothing worth boasting about. The halves end in the matching sounds tithazzīshī and īshī, giving it a rhyming snap.

Aim it at someone who is strutting or showing off with nothing to back it up. It is a mocking, sarcastic jab, so saying it directly to someone can land as a put-down; it suits banter among familiar people rather than polite or formal speech.