«نُمُوتْ وِنِحْيَى فِي فَرَحْ يِحْيَى»

Here farah means a wedding celebration rather than simply joy. The saying pictures people so wrapped up in one wedding that their entire existence revolves around it. Dying and reviving stands for the full cycle of sleeping and waking, not literal death; every day and night passes inside that single concern, leaving no room for other talk or tasks.

Applied more broadly, it describes anyone wholly absorbed by a single matter, who keeps returning to it at every moment and mentions it constantly. Nothing else seems to register for such a person; the one concern sets the rhythm of each day and dominates every exchange.

Apply it to a person whose waking hours and conversations keep circling back to one preoccupation, so that they appear to have no other subject to discuss and no other business to attend to.