hold (something) back for a rainy day
(redirected from hold back for a rainy day)hold (something) back for a rainy day
To reserve something, especially money, for use in a time or period of unforeseen difficulty, trouble, or need. I know you want to buy a new TV with your bonus, but you should really hold that money back for a rainy day. I hold a portion of my wages back each month for a rainy day.