Definition of afterclap:
(n) :
The consequence (often, but not always, adverse) of an action or event.
(n) :
A phenomenon occurring after a similar earlier one; a later manifestation of something.
(n) :
A sound that follows another, especially a loud noise, such as thunder.
(n) :
A symptom of an illness, especially one that appears after the initial onset; an illness or symptom caused by exposure to a substance, an injury, etc.
(n) :
(humorous) A child born after the one that was intended to be the last.
(n) :
(archaic) An additional adverse event that occurs unexpectedly after an earlier one was thought to be over and done with.