From Pluralpedia, the collaborative plurality dictionary
consumanaut (n., adj.)
Applies toheadmates

A consumanaut is, in layman's terms, a headmate that fronts for the sole purpose of helping the body to eat or consume things.

Some headmates, or even the body itself, may struggle with eating, and, as such, these headmates exist in order to feed and hydrate the body and keep it running. These headmates usually don't have issues with eating, and can be called to front with anything food related.

The term comes from the word "consume", meaning "eat, drink, or ingest (food or drink)" due to headmates consuming while in front.

The term is also a -naut term, meaning that they front for the aforementioned purpose.