Afterclap

(n.) An unexpected subsequent event; something disagreeable happening after an affair is supposed to be at an end.

Thesaurus Entries

afterbirth, afterclap, aftercrop, afterglow, aftergrowth, afterimage, aftermath, afterpain, aftertaste, by-product, consequence, event, eventuality, issue, outcome, placenta, remainder, residual, residuum, result, secundines, side effect, track, trail, upshot, wake