thunderclap

Short definition from Wiktionary

Noun

1. 1
   A sudden, loud thunder caused by a nearby lightning strike; a shock of thunder, as opposed to a reverberating rumble.
2. 2
   A very loud fart.
3. 3
   Something that makes a big, dramatic impact.
4. 4
   Synonym of thunder word.

Verb

1. 1
   To produce a loud burst of sound like a thunderclap.