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touchpaper

British  
/ ˈtʌtʃˌpeɪpə /

noun

  1. paper soaked in saltpetre and used for firing gunpowder

  2. to do something that will cause much anger or excitement

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

The touchpaper had been lit – and thankfully Ashe was now pretty much full to witness it.

From BBC

Asian markets are set for an explosive open on Wednesday after a below-consensus reading of headline U.S. inflation lit the touchpaper for a rally across all risky assets on Tuesday, although investors will be mindful of the steep rise in U.S. bond yields.

From Reuters

He diverted it into his own net, unwittingly lighting the blue touchpaper.

From BBC

Reddit-fuelled stock craze has lit the touchpaper, he said.

From Reuters

The touchpaper under the rocketing share price was lit in October, when the company surprised many investors with a quarterly profit and a bullish outlook.

From The Guardian