money burns a hole in (one's) pocket
When one has money available, one becomes very eager to spend it. I've always found that money burns a hole in my pocket, so I've never been able to keep a proper savings account. As soon as he gets paid each week, the money burns a hole in his pocket.
money burns a hole in your pocket (or purse)
you have an irresistible urge to spend money as soon as you have it.money burns a ˈhole in your pocket
(informal) somebody spends or wants to spend money very quickly and carelessly: She can’t wait to spend her prize money — it’s burning a hole in her pocket.He gets paid on Friday and by Monday he’s spent it all. Money just burns a hole in his pocket.