unthrifty

/ʌnˈθrɪfti/
adjective
  1. Not careful about managing money or resources; wasteful or extravagant.
    • The unthrifty use of water during the drought was criticized by the community.
    • She realized her unthrifty spending was the reason she couldn't afford a new car.
    • His unthrifty habits left him with no savings at the end of the month.
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