Bhagavad Gita, Chapter 18, Verse 28

Unsteady, vulgar, arrogant, dishonest, malicious, indolent, desponding and procrastinating, such an agent is called Tâmasika.

A real, blunt list of traits is given here, not softened for the sake of politeness.

Krishna names these qualities directly rather than describing them gently. Real bluntness in this description matches the real severity of the mode being described.