Fenced off piece of farmland.  Unlike in the United Kingdom, paddocks can be hundreds of acres in area.

Short for 'I beg your pardon.'  Often short for 'I beg your pardon, what did you say?' but could mean, 'I beg your pardon for farting/burping/hiccuping/doing whatever undesirable act I have just been caught in.'

Passionate kiss.  Teenagers are too busy doing it to say the words in full.

Hallway in a building not a body.

Petroleum fuel.  Called gasoline or gas in the United States.

Australians have a strong tradition of swimming, surfing and diving.  When a diver pikes out they finish a somersault and prepare to enter the water.  However the implication is that when they piked out, they did not complete the required number of somersaults.

Portable toilet, originating from the brand name Portaloo (so clever!) but now referring to all such dunnies.

Any plant grown in a pot.  Container plant or potted plant.  Easy to weed, ha ha.

Snaps, snap fasteners.

Bar.  Comes from public house, a house open to the public for the sale of ale (beer).

An Australian purse would go inside an American purse.  An Australian purse was originally a clutch purse, so is often called a clutch in America.

Demand a loan of money.