You searched for: “geophagist
geophagist (s) (noun), geophagists (pl)
Someone who consumes soil, clay, or earth: Little Sam wanted to eat some soil like the earthworms, which wasn't good for him, and he found out that such a person was termed a geophagist.

A geophagist is an individual who has a form of pica, or the indiscriminate craving for and consumption of substances, such as paint chips, clay, plaster, or dirt.