Tighter than a fish's arse

While you're here

• Flat out like a lizard drinking

  Extremely busy. Can be sarcastic about someone who isn't busy at all.

• Dry as a dead dingo's donga

  Extremely thirsty. Also used for weather that has not seen rain in months.

• Full as a fat woman's sock

  Completely full, usually after a big feed. Sometimes used for very drunk.

• Flash as a rat with a gold tooth

  Showing off and very pleased with yourself.

• Rare as rocking-horse poo

  Almost impossible to find.

• Sell my mum to afford one

  Something is so expensive you would have to do something drastic to buy it.

Random one for ya