Short for Courtesy Wave. Basically, any time a stranger shows you some Courtesy, a car lets you in traffic, chuck em a Courto Wave, A bloke lets you in the line, give em a Courto Wave. A bloke waits for your to reverse out of a carpark without blocking you in like a fuckwit, give them a Courto Wave. It's the right thing to do. It's unaustralian not to.
When you let someone in traffic, you have to give them a Courto Wave, if you don't your a cunt. It's as bad as not returning your trolley.
by Scroatal August 10, 2023