easy come, easy go Informal
Meaning: You can say "easy come, easy go" to express the idea that if something comes to someone easily, such as money they get without working hard for it, they can lose it just as easily and it won't matter to them much.
- Harry's very easy-going, especially when it comes to money. It's easy come, easy go, as far as he's concerned.
- The share market's been falling recently, and I've lost a fair bit of money, but it's easy come, easy go, really, because it's just money I've earned from shares in the past.