"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*