shiteyanyo (deleted)
シテヤンヨ
Fucked-up version of Hatsune Miku's head with twintails for legs (or is it legs for twintails?). The meme originated with this Pixiv post by puzzle157xxx.
Adding what to any image of this creature is understandable, but you probably shouldn't overdo it.
See also
This tag has been aliased to shiteyan'yo (learn more).