What you don't forget to bring.
Often used as an item that a minority, say the nerds in a classroom, will bring.
It is often the thing that your mind completely skips.
Teacher: Don't forget to bring your Norman tomorrow!
Teacher: Did you finally find your Norman?
Ambrose: Nah, couldn't find my Norman...
Leo (whispers): Dude, he brought his Norman AGAIN...
Rikky: Miss, can I go get my Norman?