Whether it's a friend, a colleague or a partner, chances are you've encountered a passive-aggressive person before.
Grazina Fechner, behaviour and communication expert, says passive-aggressive people can be harder to deal with than those who are simply aggressive.
"We really understand the traits of an aggressive person, we just know them. The passive-aggressive ones we don't know because they seem really nice on the outside."
She says passive-aggressive behaviour can manifest itself in many different ways.
"They give you the silent treatment, they give you those backhanded compliments, they procrastinate, they're a bit late, and they think that the world owes them something."
She spoke to The AM Show about how to spot passive-aggressive behaviour and what to do about it.
The AM Show with Duncan Garner, Amanda Gillies and Mark Richardson, weekdays 6-9am on RadioLIVE and streaming live to the ROVA app on Android and iPhone.