Volcanorexia

Volcano.
Anorexia.
Volcanorexia.

These mountains hardly eat anything.
(Just the occasional virgin sacrifice.)

Purity.
Ritual.
Puritual.

And sometimes they spew.
(So it's more like bulimia, actually.)

Stomach.
Magma.
Stomagma.

Eating disorders can be dangerous.
Just ask the people of Pompeii.

Graves.
Vesuvius.
Gravesuvius.