The modern day example of a “yo mama so fat” joke. Often used on elementary and middle school play grounds. So yeah... if you don’t wanna sound like a child... say “YO MAMA SO FAT, SHE USES THE HIGHWAY AS A SLIP & SLIDE!” . Veteran move.
A meme that is actually older than everyone thinks it is. Originally spawned from the YouTuber Pyrocynical, who received a tweet from BamanBoi in mid 2016 that read, "you're mum gay".