1. Hit or strike: Wallop can mean to hit or strike someone or something with force. For example, "He walloped the ball out of the park."
2. Defeat or overcome: Wallop can also mean to defeat or overcome someone or something decisively. For example, "The team walloped their opponents in the final match."
3. A heavy blow or impact: Wallop can refer to a heavy blow or impact. For example, "The boxer landed a wallop on his opponent's jaw."
4. A large amount or quantity: Wallop can be used to describe a large amount or quantity of something. For example, "He ate a wallop of ice cream."
5. An alcoholic drink: Wallop can also refer to an alcoholic drink, especially a strong one. For example, "He had a few wallops at the party."
The term "wallop" is not exclusively Australian, but it is commonly used in Australian English.