A more thorough explanation:

Definition: A person who spends money recklessly and wastefully; a spendthrift.

Example: John was an unthrift who spent all his money on expensive clothes and fancy cars, leaving him with nothing for his basic needs.

Explanation: The example illustrates the definition of unthrift by showing how John spends his money recklessly and wastefully on things that are not necessary, leaving him with nothing for his basic needs. This behavior is typical of an unthrift, who is known for being a spendthrift and not managing their finances wisely.