What is the meaning of Middling?

Of intermediate or average size, position, or quality; mediocre.

In fairly good health.

Fairly, moderately, somewhat.

Not too badly, with modest success.

Something of intermediate or average size, position, or quality.

  1. Preceded by the: people of moderate means; members of the middle class.

Preceded by the: people of moderate means; members of the middle class.

Source: wiktionary.org