-passive aggressive or covert bullying. This is a less frequently mentioned form of bullying, but in some ways it’s the most insidious. With many bullies, you can see them coming because they are quick to make their intimidating presence known. A passive-aggressive or covert bully, however, behaves appropriately on the surface, but takes you down with subtlety.
Examples of passive-aggressive and covert bullying include negative gossip, negative joking at someone’s expense, sarcasm, condescending eye contact, facial expression or gestures, mimicking to ridicule, deliberately causing embarrassment and insecurity, the invisible treatment, social exclusion, professional isolation, and deliberately sabotaging someone’s well-being, happiness, and success.
“Behind the smile, a hidden knife!” ―Ancient Chinese proverb describing passive-aggressive behavior article.