jejune

Not interesting; dull.

Lacking maturity; childish.

Lacking in nutrition.

Scantily supplied or furnished; attenuated; poor.

Barren; unfurnished; wanting pith or interest, as a literary production; devoid of sense or knowledge, as a person; dry; uninteresting; shallow.

Lacking matter; empty; void of substance.

Void of interest; barren; meager; dry.

Juvenile; childish; immature.

Lacking nutritional value.

Not nutritious.