Literally to consume ones own excretions - a byproduct of their biological existence - in a manner akin and even more vile than cannabalism - and then promptly cease to exist; it is not simply because they have eaten the shit that they die but because in the grand scheme of things they are eternally damned and will simply perish by the will of the universe, presumably.
Although the Russian insults to call someone the pus from the zit on the ass of a diseased camel is quite poetic and rich, the English phrase "eat shit and die" is in the Anglo tradition a more perfunctory and utilitarian insult which is at the same time existentially profound and shockingly curt.
WHEN YOU STUFF IT DOWN AS FAST AS YOU CAN
MAN SHE CAN EAT THE SHIT OUT OF IT THOSE HOTDOGS WERE GOOD
Popular phrase used by bike riders (speciacally moutain) when they go over the handlebars face first and rub against the dirt.
Jeff keeps Eating Shit on this jump
to categorize someone who is unable to walk due to an athletic defect. Commonly refereed to as "Julieing it". A person generally called Julie G.
Oh did you see Julie eating shit in the parking lot. She is sooo unathletic. Poor her.
Perform an action given by an individual or group that is stupid or embarrassing.
Hey, did you hear that Joe had eat the shit given.
What did he do?
He started jacking off in public when he was told it was cool or something.