That's Joey Chestnut in the middle of pounding 32 Big Macs on Thursday ... and, yeah, it's the most disgusting/awesome thing you'll see all day.
The competitive eating legend posted the video on his social media ... saying he was having a cheat day and wanted to accomplish something he -- nor any other person -- had ever done.
So, the dude set out to grab a McDonald's world record ... and fired up his phone to get 15.36 POUNDS of Big Macs delivered to his crib.
What happened next is pretty graphic .