An exploding cigar is a variety of cigar that explodes shortly after being lit. Such cigars are normally packed with a minute chemical explosive charge near the lighting end or with a non-chemical device that ruptures the cigar when exposed to heat. Also known as "loaded cigars," the customary intended purpose of exploding cigars is as a practical joke, rather than to cause lasting physical harm to the smoker of the cigar. Nevertheless, the high risk of unintended injuries from their use caused a decline in their manufacture and sale.

A practical joke or prank is a trick played on people or people, generally causing the victim to experience embarrassment, perplexity, confusion, or discomfort. The perpetrator of a practical joke is called a "practical joker" or "prankster". Other terms for practical jokes include gag, rib, jape, or shenanigan. Some countries in western nations make it tradition to carry out pranks on April Fools' Day and Mischief Night.