“We’ve got to beat them down,” whispered Daisy, winking ferociously toward the fervent sun.
Daisy is going along with Tom’s rant but making fun of him at the same time. It seems like this isn’t the first time she’s heard him go on about white supremacy.
Of course this line also foreshadows Tom’s desire to violently suppress the lower classes when they try to rise to power; despite her irony here, Daisy will turn out to be somewhat sympathetic to that goal.
To help improve the meaning of these lyrics, visit "The Great Gatsby (Chapter I)" by F. Scott Fitzgerald and leave a comment on the lyrics box