lunchbox; a box used for carrying a meal

(slang) of a character in fiction, to reappear in a story line after having been supposedly killed off

a packed lunch or bento (chiefly Taiwan)

To act unappreciatively or cross boundaries in response to someone else's kindness or flexibility

(slang) to finish one's role in a movie or television show because the character died, meaning the actor can now collect their meal box and leave the set; also used by viewers to describe a character's death.