slang In fandom, the idea that a particular romantic couple (or potential romantic couple) is meant to be together (and, in the context of a fictional work, that one thinks should be in a relationship when the work ends). The term is usually used by fans who are very invested in the pairing. In the phrase, a portmanteau of the characters' names typically precedes the verb, which is singular (despite alluding to multiple people). Although Jackson and April on Grey's Anatomy had a rocky relationship over the years, Japril is still endgame for many fans. Klaine was always endgame to me, so I'm not surprised they ended up together on Glee.