To initiate a fight by throwing the first punch.
"That guy was about to punch on!"

"Some bloke was flirting with my girlfriend - I was ready to punch on."
by iSkawt June 17, 2008
Australian slang meaning to fight, or get into a fight.
He's always up for a punch on
by qihaoming June 09, 2006
To initiate a fight by throwing the first punch.
"I think that guy was about to punch on!"
by iSkawt June 15, 2008

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