EnemyGraph is a new app which lets users add Enemies to Facebook profile - including real victims from friends list, or from other users of the app, Daily Mail reports.

Users can also declare war on any product, person or company that has a presence on Facebook.

As soon as the user declares someone - or something - an Enemy, they appear on the profile on the Enemies list, visible to other users of the app.

Its creator, Dean Terry of the University of Texas at Dallas, describes the app as 'social media blasphemy' - and predicted that Facebook would remove the app.

A petition signed by three million people called for an 'Unlike' button on Facebook, but so far the social network has yet to offer such a facility.

Five users have already opened hostilities with the Twilight series of films, two had declared their opposition to tomatoes and one person had made an enemy of Nobel Prize-winning German author Thomas Mann.