Friendly match swap undershirts

A screenshot of a tweet by Essam Al-Zamil suggesting that Sunni and Shia scholars pray in each other's mosques to show unity, followed by a sarcastic reply from Abdulaziz Alshehri asking if they will swap undershirts afterwards like a football friendly match.

Used to mock unrealistic or overly idealistic proposals for reconciliation by comparing them to sports trivialities.