used to describe when a computer or game console "crashes' to a point that it is no longer usable, or only usable if the operating system is reinstalled; or in cases of game consoles repairs need to be made that are more expensive than the console is worth. The crash usually results in corruption of all files on the device, making any efforts to get them back useless.
It's like verbal diarrhea but with data! It often happens that you're looking for something (googling it perhaps) and you're hit with a barrage of data which might as well be in Chinese because you don't understand it anyway! And as you struggle with the reams and reams of endless information, you wonder if there is a pill you could take to make it all go away. Datarrhea!
Dude, I just googled statistics on US inflation and all I got was major datarrhea!
The professor is obsessed with graphs, he's got a severe case of datarrhea.