When a person develops strong emotions for 2-dimensional characters, typically anime
characters. They're more concerned with their fictional love interests than real people.
Don't even bother trying to get with him, he's got a 2d complex.
Japanese: "No thanks", "I'm cool", "It's okay" - basically, a halfway polite, understated refusal. Only used by true otaku
(who seem to have picked it up from watching anime
subtitled) or actual Japanese people. Not to be confused with "kekkon suru" - to get married.
Friends: "Wanna dress up like maids with us?"
You: "Kekko desu."