billabong 

A brand of surf wear or beach clothing that is not for people who want bargain basement clothing. Basically nice clothing that is well worth the price. ( yes, also an Australian water flow).

Girl: nice shorts! Dude: smiles. Billabong.

billabong by Oldscool62 April 19, 2022

Billabong day 

On September 23 every year all boys are encouraged to wear Billabong.

Omg, tomorrow is billabong day.

Billabong day by Vshshdhsjs September 23, 2022

Billabong 

Billboard

That billboard is called a billabong in the states!

Billabong by kappagunnakap March 21, 2023

Wetpong Billabong

When you're sitting on the toilet and you have a feeling two blokes from Alice Springs are gonna have a disagreement and play ping pong with your nutsack using frying pans.

Hey Wongi, I feel like me sack is gonna get a good Wetpong Billabong if I sit here too long, mate! Give me a handy with me petrol brandy!

Wetpong Billabong by CyberBoongTyler October 25, 2025