PS Parthian shot 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 peroration postface postfix postlude postscript 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