Ambigram (from Wikipedia)
An ambigram, also sometimes known as an inversion or flipscript, is a graphical figure that spells out a word not only in its form as presented, but also in another direction or orientation. The text can also consist of a few words, and the text spelled out in the other direction or orientation is often the same, but can also be a different text.
Assault Of Knowledge ambigram by Adam Reid, who should be fired for making ambigrams on work time.

