An adjective used to describe a person's mental state or behavior as crazy, spacey,absurd, out of touch with reality, obsessive, overblown, psycho, or bitchy.
Mostly liked derived from the parochial slang term of being "out to lunch".
Usually followed by the word 'yo'.
"My ex called me last night asking me why I never her call her anymore; pshhh, that bitch (dude) is luncheon (yo)"
Luncheon is a scrapped evolution of the Pokémon known as Eevee intended to be implemented in The popular video game Pokémon sword as a version exclusive
But unfortunately it was removed in early development because Satoshi Tajiri himself told The development team that their idea was so stupid that if they didn’t remove it he would shut down the project
And now the term is commonly used to refer to meat