Be rude and dismissive
Interrupt people constantly
Never listen when others speak
Mock people’s ideas and opinions
Take credit for other people’s work
Gossip behind people’s backs
Show up late and act like it does not matter
Ignore social cues and personal boundaries
Complain about everything
Refuse to apologize when you are wrong
Dominate every conversation
Make everything about yourself
Be inconsiderate of other people’s time
Criticize people publicly
Act superior and condescending
Break promises repeatedly
Use sarcasm to belittle others
Never express gratitude
Dismiss other people’s feelings
Pick fights over minor issues