Noun.
Ex 1
Person 1: Has anyone told you about...
Person 2: Eh, miijjoe! (Shut up, that's a secret.)
Ex 2
Person 1: Ya know miijjoe (the secret)?
Person 2: miijjoe up! (
Of course! I'm in da know/I know the secret.)
Ex 3
Person 1:
What the newest miijjoe?
Person 2: A new business
opening up on...