What is the meaning of Derogatory?

Disparaging.

Tending to derogate:

Reducing the power or value of (a governmental body, etc); detracting from.

Lessening the worth of (a person, etc); expressing derogation; insulting.

Being or pertaining to a derogatory clause.

A tradeline on a credit report that indicates negative credit history.

Source: wiktionary.org