Question: what does it mean when someone says love you 3000?
Answer: “I love you 3000” means essentially I love you a lot. It came from Avengers: Endgame. Tony Stark tucks his daughter into bed and she tells him that she loves him 3000. It was originally something that Robert Downey, Jr.'s actual kid told him and he wanted it incorporated into his (potentially) final MARVEL movie.