spendthrift

"The heavy rain was leaving puddles all over the playground. "

"Do you need a gift for that special someone?"

"What is your thinking on this subject?"

"The author's extravagant claims about the alien encounter stretched far beyond any credible evidence. "

"The new sports car was incredibly expensive, costing more than my entire year's savings. "

"supply and demand"

"My dad's drawer is full of gadgets; I never know what half of those thingamajigs are for! "

"The teacher gave the students allowance to finish the project early if they worked hard. "

"He became a profligate, gambling away his inheritance and alienating his family with his reckless behavior. "

"Buying a new phone every year is a wasteful habit. "

"Spending all her paycheck on clothes and not saving anything was an improvident decision that she later regretted when the car broke down. "

"The school is located just outside the town, without the main shopping area. "