When OP complains about memes in the game I got to wonder if he's conflating memes that have become memes after Undertale were copied by Undertale into Undertale because I didn't find anything that isn't sourced to Undertale already.

And I absolutely refuse to do a genocide run of the game because I do not want to stab Goatmom again or kill Goatgod. And no amount of genocide can bring by Goatbro.