The Uporoty Fox is perhaps one of the craziest memes together with the Tard Cat that 2012 brought us - and it makes me immensely sad so far this meme is only well-known in runet other than the world-wide web
Since it's... just...
Generally the Uporoty Fox was created by the British taxidermist Adele Morze; and it gained popularity after having been sold on ebay in autumn.
"uporoty" [u-'po-ro-tiy], "u" as in "woohoo" is a hardly translatable generic term for describing a person being high due to heavy drugs impact
The Fox is used in situations like this [link] Or this [link]