noun. The essence of what-the-fuckness, according to what-the-fuckologists.
Related terms: WTF, WTFitude, WTFage.
Real citation: "Notes: skip straight to 3:10. Watching the explanation beforehand can only reduce the sheer WTFosity. Also, keep an eye out for the puffs of smoke that represent GTP hydrolysis, if you're the type to get excited about such things. And for the love of god, do not pass this up."
(Oct. 30, 2006, http://doctorfedora.livejournal.com/2006/10/30/)
Made-up citation: "Though WMDs were never found in Iraq, four years of war have turned up substantial quantities of WTFosity."