Don't steal my dinner money!

A phrase used in a sarcastic manner in order to make the person you're talking to feel small/insignificant. Can also be used when being informed that you're incorrect about something.

1) Tom: "What's the time?"

Will: "8 I think."

Laura: "It's 9 actually."

Will: "Soz, don't steal my dinner money!"

2) A twelve year old chav tries to mug you..

Dave: "Mate, don't steal my dinner money."