不食人間煙火

Etymology
According to folklore, the daoists believed that celestial beings (仙人) never ate cooked food. Later on, this phrase was used to describe a person who has other-worldly qualities similar to that of celestial beings.

Idiom

 * 1) out of touch; no sense of the practical
 * 2) other-worldly
 * 3) to not eat anything
 * 1) to not eat anything
 * 1) to not eat anything