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Definition of lighter fluid
1 : the liquid in a lighter (such as a cigarette lighter) that is its fuel
2 : a liquid accelerant used especially to ignite charcoal briquettes for grilling food
The average back-yard chef, wishing to cook hamburgers, tries to ignite the charcoal via the Squirt, Light and Wait Method, wherein you squirt lighter fluid on a pile of briquettes, light the pile, then wait until they have turned a uniform grey.— Dave Barry
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Merriam-Webster unabridgedWords at Play
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Time Traveler for lighter fluid
The first known use of lighter fluid was in 1922
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