1 definition by MIDORIYA-SHŌNEN

If your not referring to the Marvel film or the chess term, endgame means a pairing for a fictional work by the fanbase in which two characters will be romantically together by the end of series. Hence the term “ENDgame”.

But on this page on Urban Dictionary, it’s pretty much people stating their preferred ships in the examples, just like this one:
“The love-square from Miraculous Ladybug is ENDGAME, anyone who ships Lukanette is a liar and a coward, or worse, a Luka stan.
by MIDORIYA-SHŌNEN September 9, 2020
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