Some nascar racer named Brandon won a big race. During the post race interview a chant of "Fuck Joe Biden" went up in the crowd.
The interviewer said they were chanting "Let's go Brandon". So dipshits all over started using that phrase as an anti-Biden slogan. This is also why there's a "Dark Brandon" meme for occasions where Biden trolls the Republicans.
As I understand the caption, this is actually the most commonly googled dream type. I'd expect this is not actually the most common dream type per country, because the most common experiences aren't worth investigating.
maybe it's more like "type of dream that most commonly confuses and disturbs people in a given culture".