spend money like it's going out of style
To spend money very quickly and in great quantities. We had a table of people in the restaurant last night who were obviously very wealthy, because they spent money like it was going out of style. After getting his Christmas bonus, Jim started spending money like it was going out of style.
spend money like it's going out of style
and spend money like there's no tomorrowFig. to spend money recklessly; to spend money as if it were worthless or will soon be worthless. Extravagant? she spends money like it's going out of style! I can't control it. I spend money like there is no tomorrow.