Hippiemancy is one of the eight major classes of magic in Erfworld.
It is the major class defined by the Life and Matter elements together. Pursuit of Hippiemancy appears to distort one's perception of time; Hippiemancers call this "flaking". Hippiemancy can apparently be used to "quiet" a battle, though the precise meaning of "quiet" has not been revealed.
Janis is a Grand Abbie of Hippiemancy. According to her, Parson Gotti is also a Hippiemancer.