"A Non-Disparagement clause restricts individuals from taking any action that negatively impacts an organization, its reputation, products, services, management or employees.

Example Definition: Disparaging remarks, comments or statements are those that impugn the character, honesty, integrity, morality or business acumen or abilities in connection with any aspect of the operation of business of the covered individual or entity."

http://www.contractstandards.com/clauses/non-disparagement