(n.) The concluding part of an oration; especially, a final summing up and enforcement of an argument.

PS Parthian shot Z addendum address after-dinner speech afterthought allocution apodosis appendix back matter catastrophe ceasing cessation chalk talk chorus coda codicil colophon conclusion consequence consummation continuance continuation crack of doom culmination curtain curtains death debate decease declamation denouement destination destiny diatribe doom double take dying words effect end end point ending envoi epilogue eschatology eulogy exhortation expiration fate filibuster final solution final twitch final words finale finality finis finish follow-through follow-up forensic forensic address formal speech funeral oration goal harangue hortatory address inaugural inaugural address invective izzard jeremiad last last breath last gasp last things last trumpet last words latter end omega oration parting shot payoff pep talk period philippic pitch postface postfix postlude postscript prepared speech prepared text public speech quietus reading recital recitation refrain resolution resting place sales talk salutatory salutatory address say screed second thought sequel sequela sequelae sequelant sequent sequitur set speech speech speechification speeching stoppage stopping place subscript suffix supplement swan song tag talk talkathon term terminal termination terminus tirade valediction valedictory valedictory address windup