Slang word most often used by Britain, New Zealand and Australia.

American teenagers use it because they just follow other countries, thinking it makes them Indie or something.
Nubs.

What Australian males call every other male, saving them from having to learn people's names. Sometimes even extended to females.

ausie friend

(British) A friend or companion or it's used as a friendly form of address between men or boys

Slang term in English Language for a friend. Used to describe someone who replies to messages from other ‘mates’, enjoys banter, and doesn’t spend all day avoiding other ‘mates’ and leaving them to play Warzone and FIFA on their own.

Obviously it's a slang for us Australians and new Zealanders

Mate is one of the most sweet and loving boys you will ever meet. He is a great friend. He is really funny, trustable and handsome. If you have a Mate in your life you're really lucky and you should never let him go! He will make you feel better when you're sad, but Mate's are also real sensitive so you should watch out about what you say. If you do something that hurts him he will forgive easily if you are really sorry when you say sorry. Also you should never lie to a Mate because he can see right through you. If you have a Mate in your life your real lucky!!