na na nu nu
A stupid phrase from a 70s show, used when someone wanted to greet another person like they were from another planet and had no idea what a handshake was.
My friend said 'na na nu nu' to the principal and got sent to the office.
My dad used 'na na nu nu' to greet the mailman and got a weird look.
My dog said 'na na nu nu' to my cat and started a war.