He won a lot of money in the lottery, but he spent it all in a month. Easy come, easy go.
Он выиграл много денег в лотерею, но потратил всё за месяц. Как пришло, так и ушло.
Definitions
This phrase means that things gained with little effort or difficulty are often lost just as easily. It suggests a casual attitude toward gains and losses, especially regarding money or possessions.