Spencer Pratt is heating up his beef with California Governor Gavin Newsom amid lawsuits over wildfires ... he says "Newsom's lawyers" are either bumbling idiots or the world's biggest liars.

The reality TV star hopped on social media and blasted Newsom over a section from a recent legal filing in a lawsuit where wildfire victims are going after the State of California. Getty

Spencer says "Newsom's lawyers" are arguing Topanga State Park in Los Angeles County did not store large quantities of highly combustible gasoline before the January fires.

Fire victims, like Spencer, claim dead vegetation in Topanga State Park fueled the Palisades Fire that killed a dozen people and destroyed several thousand structures, including Spencer and Heidi Montag 's home. Gallery Launc

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