noun

• (informal) A very loud fart.
• (figurative) Something that makes a big, dramatic impact.
  "A 21-Valyrian steel dagger salute to Paddy Considine, who makes his exit from House Of The Dragon this week with a thunderclap of a performance. “The Lord of the Tides” is the swan song for his King Viserys I Targaryen, a well-intentioned but indecisive man who waited until the very last day of his life to flex his royal might."
• (literature) Synonym of thunder word.
  "[…] the thunderclaps, and advised Cage on their meaning. Cage considered composing new star-map music, in which microphones attached to the throats of the chorus members would make their singing of Joyce's verbal thunderclaps sound like […]"

verb

• (intransitive) To produce a loud burst of sound like a thunderclap.
  "It struck just before dark, a massive black geyser of oil and gas that thunderclapped from the well, soaring a hundred feet into the air and then even higher, […]"