spendthrift

US /ˈspend.θrɪft/
UK /ˈspend.θrɪft/
1.

verkwister

someone who spends a lot of money in a way that wastes it:

:
Max was a spendthrift and a heavy gambler.
1.

verkwister

spending a lot of money in a way that wastes it:

:
He struggled to support a large family that included his spendthrift father.