parting shot

a parting shot (a remark that you say as you are leaving somewhere so that it has a strong effect) — последнее слово; колкость на прощание

Example 1: Her parting shot was 'I'm going to spend the evening with people who appreciate my company!' (CIDI)

Example 2: I guess this would be a good time for me to list a few reactions and then take a parting shot or two, myself. — Я думаю, пора бы мне перечислить несколько видов реакций, а затем сказать свое последнее слов.. или два последних слова.

also
Parthian shot — парфянская стрела (колкость или меткое замечание, приберегаемое к моменту ухода)
[колкость]
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Related terms:

addendum, afterthought, appendix, back answer, back matter, caustic remark, chorus, coda, codicil, colophon, comeback, conclusion, consequence, continuance, continuation, crack, cut, cutting remark, dig, double take, dump, dying words, envoi, epilogue, fleer, flout, follow-through, follow-up, foolery, gibe, gibing retort, jab, jape, jeer, jest, last words, leg-pull, mock, Parthian shot, peroration, postface, postfix, postlude, postscript, PS, put-down, put-on, quip, refrain, rude reproach, scoff, scurrility, second thought, sequel, sequela, sequelae, sequelant, sequent, sequitur, short answer, slam, slap, subscript, suffix, supplement, swan song, swipe, tag, taunt, twit, verbal thrust