endgame
n.the final stage of a long process or game where you try to reach your goal. In modern slang, it also describes two people who are perfect for each other and should stay together forever.
n.the final stage of a complex process, strategy, or competition, particularly in chess or politics. In contemporary informal contexts, refers to a romantic pairing perceived as the ultimate or permanent ideal.
“The two main characters are definitely endgame.”
“The diplomat's endgame involved securing a ceasefire before the winter set in to prevent further casualties.”
“While the early rounds of the negotiation were focused on minor concessions, the endgame required both parties to address the fundamental territorial disputes that had fueled the conflict for decades.”
Often used as a predicative noun in slang contexts to describe a romantic couple.
From end + game.
Etymology adapted from Wiktionary, available under CC BY-SA 4.0.