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Kid Rock is here to troll Gavin Newsom 'All Summer Long' -- and that's exactly what he's doing in a clapback to the California governor.

Check out his hilarious post on X -- the singer ain't laughing at Newsom's image posted Sunday depicting KR dressed as Uncle Sam, encouraging Americans to support Newsom. X / @KidRock

Instead of simply ignoring it, he had posted a rebuttal Monday night that could have come out of any middle schooler's mouth -- "The only support Gavin Newscum will ever get out of me is from DEEZ NUTZ"

And if you're not cracking up at the shade, Elon Musk 's got ya covered ... 'cause he posted a laughing emoji reply. Getty

Newsom didn't just stand there and take the hate -- he responded Tuesday morning, seemingly shouting from behind

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