Spendthrift (noun)

1. A person who spends money recklessly or wastefully.
2. A person who is not careful with money and tends to spend it too quickly.

Origin:

From middle english spenden ("to spend") + thrift ("thriftiness"), from old english þrift ("thriftiness").

Examples:

1. He was a spendthrift and blew all his money on luxuries.
2. She was a spendthrift and lived beyond her means.
3. The spendthrift was always in debt and couldn't save any money.
4. The spendthrift's reckless spending habits led to financial ruin.
5. The spendthrift had to learn to be more frugal and budget her money.