afterclap
/ˌæftərˈklæp/Definitions
1. noun
A sudden loud noise or event that occurs after the main event, often causing surprise or shock.
“The afterclap of the explosion startled everyone in the area.”
2. verb
To cause a sudden loud noise or event to occur after the main event, often intentionally.
“The prankster afterclapped the partygoers with a surprise firework.”