totally awesome day

“Totally awesome day” is a parody dogwhistle meaning “total alien death”. Alien in this instance is used to refer to extraterrestrials as in martians and not human immigrants.
The phrase comes from a TikTok where it is used in the comment sections of human supremacy edits. These edits often involve the idea of humans being superior to other lifeforms, usually because humans were ‘made in the image of god’ or some similar reason.
Basically it’s space racism.

Virgin Martian: “Bleep plam human flirp?”
Chad Human: “Have a totally awesome day!”
Virgin Martian: “Globu kling blorp… D:”