What does 'Let's go Brandon' mean?

What is the meaning of Let's go Brandon ? - Question about

Let's Go Brandon

Let's go, Brandon': what it means and why some in the US keep chanting it

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Brandon Meaning

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Let's Go Brandon - Wikipedia

How 'Let's Go Brandon' became code for insulting Joe Biden

Who Stamped 'Let's Go Brandon' on Stanislaus County Tax Envelopes