thumpya

Aussie slang generally used in football matches as a threat to members of the opposite team.
Closely linked to words such as "gunna" or "will" and generally followed up with a "knuckle sandwich".
Not to be used angrily towards anyone over a brown belt in martial arts or the bouncer at the local night spot.

You even look sideways at my sheila and i will thumpya,
You touch that ball and I will thumpya