Cracking observations mate. Here are few more little perlers:
1) The seemingly impossible abbreviation of BBQ to Barbie.
2) Snags = the humble sausage.
3) Sanga = sandwich.
Examples of everyday use:
1) That bloke, he’s a few snags short of a barbie.
2) Anyone who thinks England is going to win the Ashes this year is a few sangas short of a picnic.