rain check

1. PHRASE If you say you will take a rain check on an offer or suggestion, you mean that you do not want to accept it now, but you might accept it at another time. 目前無法接受，但可日後接受的邀請或建議

I was planning to ask you in for a brandy, but if you want to take a rain check, that's fine. 我本想請你來喝盃白蘭地，但如果你想改日再來，也行。