Phubbing is the habit of snubbing a physically present person in favor of a mobile phone. Quite simply, it’s phone snubbing. It’s not cool.

Phubbing was first coined as a term in May 2012. An Australian advertising agency created this word to describe the growing phenomenon of people ignoring their friends and family who were right in front of them and instead scrolling through their phones. Soon after, the Stop Phubbing campaign was launched.

While the word might not be in your daily vocabulary, the action likely is. One study found that more than 17 percent of people phub others at least four times a day. Almost 32 percent of people report being phubbed two to three times a day.

While the behavior might not seem like a big deal, research suggests phubbing may be hurting your relationships and your own mental health. Read on to learn more.