Johnny Be Good Edit Meaning

1.

Used to signify somebody trying to leave a conversation or to indicate a sudden celebration

"Oi, so me mum is cooking some poptarts, you want to come over for a bite and to watch some Hotel Babylon laterz?"

"And there's the johnny be good." *leaves rapidly*

or

"Oi, so me mum is cooking a big fat steak and we're going to watch the new episode of Dr. Who, you want to join?"

"And there's the johnny be good." *jumps for joy*

See leaving, celebration, doctor who, skids