"Let's go Brandon" became a euphemism or a coded phrase used by some individuals to express discontent or criticism without directly using explicit language. It originated from a viral video where a reporter misinterpreted a crowd chanting "F*** Joe Biden" during a NASCAR race as "Let's go Brandon," providing a more sanitized version for the broadcast.
Since then, the phrase "Let's go Brandon" has been used humorously or sarcastically by some who might want to express dissatisfaction or disapproval toward a situation or a public figure, particularly in relation to politics. It's used in a variety of contexts, often on social media or in public discourse, though its meaning or intention can vary widely depending on the user and the context in which it's used.