Short for "Wall of Text: Did Not Read." A way of telling poor writers to learn how to use punctuation and paragraphs to make their work readable. Often used on forums for MMORPGs to respond to long-winded, poorly formatted rants about class changes.
"Dude, did you see that post in the Shaman forums? That guy was pissed!"
"I saw it, but I didn't read it. I just replied WOT:DNR"