Heavyweight War Brewing, 'I'm Gonna Break Your Jaw"

Power Slap heavyweight Ryan Phillips is warning Austin Turpin -- stop running your mouth or "I'm gonna break your jaw."

Turpin burst on to the Power Slap scene with a victory over Cody Cox -- but got Ryan's attention by talking trash to the veteran striker DURING THE MATCH.

Turpin then vowed to smash through Phillips if the two ever clash on the Power Slap stage.

Now, Phillips is firing back at the newcomer -- saying Turpin is nothing more than a "meatball with a mouth."

This one is just heating up ...