Per author Bill Bryson, in Australia, a Chew 'n Spew is a roadside enterprise that offers both gas and dining. Thus, you can "chew" your food, and "spew" gas into your car.
"G'day mate. I've got a bit of a rumble in my tummy. I stopped at a chew 'n spew on my way in from Melbourne, and the soup doesn't seem to be agreeing with me."
by BuckGuy1 January 14, 2010
What you call any restaurant or fast food chain that you're not particularly fond of. Translates to "Eat 'n' Vomit" in Aussie slang, and a play on the "X 'n' Y" convention of naming eateries where X relates to eating, and Y is usually 'Go'.
by Choda Boy 57 March 16, 2008