Its a reference to Bullet with Butterfly Wings - by Smashing Pumpkins. An old 90s song all us middle aged Americans heard on the radio so much that even people who don’t like that band would probably recognize it
If this is the only pumpkins song you know it's not really representative. This is the most angry teenage angsty song on there, that's plenty of melodic
songs.
I think people buying the record after hearing only this song would have buyers remorse.
"The world is a vampire" is the opening line from the Smashing Pumpkins hit "Bullet with Butterfly Wings"
The meme rejects the notion of flat earth by instead asserting that the song is literal and not metaphorical. This was not the expected mode of argument, hence comedy.