NaBub
NaBub is when some schmuck says 'night night' and 'bye bye' like they’re giving you a gold star for leaving, even though they’re too lazy to actually say goodbye.
NaBub? More like NaBub, you’re fired.
Night night, I’ll be here when I feel like it. Bye bye, you’re annoying.
NaBub? You’re not even worth the trouble of being rude.