Take a rain check

The phrase "take a rain check" is an idiomatic expression that conveys the act of declining or postponing an invitation, offer, or proposed activity to a future, more convenient time or date. It originated from the practice of issuing tickets (rain checks) to spectators at outdoor events like baseball games, enabling them to attend a future game if the current one was canceled or interrupted due to rain. Nowadays, it is commonly used in a broader context and can be applied to various situations where someone cannot participate in or accept something immediately but expresses their willingness to do so at a later time.