easy come, easy go idiom informal
（尤指钱）来得容易去得快
said when something, especially money, is easily got and then soon spent or lost
I lost £500 in a card game last night, but that's life - easy come, easy go. 昨晚我赌牌输了500英镑，但是人生就是这样子——钱这东西来得容易去得也快。