overspender

As a noun overspender is

one who overspends.

As nouns the difference between terms and overspender

is that terms is while overspender is one who overspends.

Spendthrift is a synonym of overspender.

As nouns the difference between spendthrift and overspender

is that spendthrift is someone who spends money improvidently or wastefully while overspender is one who overspends.

As an adjective spendthrift

is wasteful, improvident or profligate.

As nouns the difference between overspend and overspender

is that overspend is the amount by which someone or something is overspent while overspender is one who overspends.

As a verb overspend

is to spend too much money; especially, to spend more than one earns.