• They are picking on someone – ignoring them, too much supervision, leaving them out, disregarding what they say, the list can go on for this category.
• They are always telling on someone – they will snitch on anything they do and constantly brag to everyone about the other person’s mistake. Or you point the finger at the same person once again, when it was your fault.
• They openly make fun of other people – taking the ‘mickey’ out of someone in front of everyone to try and get other people to rally around you.
• They point out your mistakes and make sure everyone knows about them.
• They insult any personal characteristics like looks or personality

The above is not a definitive list.