Beware of after-claps
An after-clap is a catastrophe or
threat after an affair is supposed to be over. It is very common in
thunderstorms to hear a “clap” after the rain subsides, and the clouds
What plaguy mischief and mishaps
Do dog him still with after-claps.
—Butler: Hudibras, Pt. i. 3.
Source: Dictionary of Phrase and Fable, E. Cobham Brewer, 1894