Adjective.
colloquial term, created by brothers Michael Harris and Steven Harris, with multiple meanings. It was invented with the express purpose of being able to mean whatever the user wants it to mean.

The two most common usages are total opposites of oneanother.

Most common usage: positive.
cool, awesome, boss, excellent, great
Second most common usage: negative.
Uncool, unfair, cruel, petty, uncalled-for, shameless
other usages: anything you want

Example: "Dude that's so awesome" would become "Dude that's so chainpipe" or "That's just uncool" would become "that's just chainpipe"

Drunk.

Tracksuit pants.

A good looking person.

A person from western australia.

Earn a living.

A help or assistant.

Linen, sheets for the bedroom.

Hooligan.

Prospector.

Somebody who receives financial assistance from the government for having no job.

An aboriginal dance festival.

To emit nasal mucus by blocking one nostril and blowing out the other.

A person who dresses poorly and does not care about their appearance.

Example: You're nothing but a bogan and a disgrace to your family.

A small child.

Example: My sister in law is coming over for dinner tonight with her little ankle biter.