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A term used to describe how young children (typically between 5 and 10 years old) can make their parents do anything they want by bugging them until they crack.

The term was coined by the media in the late 1990’s and gets batted around a lot around Christmas time so as not to offend parents who lack the testicular fortitude to say no to their children.
“I didn’t want to buy Jimmy that CD, but he used his pester power and it was the only way to get him to stop”
by Andy Thorley September 28, 2004
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