Step aside, Grumpy Cat.

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Ron Swanson, your frown's old news.

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Angry emoji, ain't nobody got time for you.

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Because there's a new sourpuss taking the internet by storm -- and he is pissed.

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Seriously, don't even try to make the world's angriest baby smile...

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Because he isn't here for your "happiness" BS.

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Watch as this furious fella frowns his way through every attempt to cheer him up -- and try not to smile in the process ... he wouldn't like that.