TYDUI (IMTOU) - Then You Don't Understand It (I Made That One Up) ;-)
It's an abbreviation, and you're one of today's lucky 10000 - https://xkcd.com/1053/ for an explanation of the 10000 phrase.
It's an abbreviation, and you're one of today's lucky 10000 - https://xkcd.com/1053/ for an explanation of the 10000 phrase.