more money than sense
US /mɔr ˈmʌn.i ðæn sɛns/
UK /mɔr ˈmʌn.i ðæn sɛns/
1.
having a lot of money but making foolish decisions or purchases
:
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He bought a ridiculously expensive car that he doesn't need; he clearly has more money than sense.
•
Spending all your savings on a luxury vacation when you have debts is a sign of having more money than sense.