Mobbing, as a sociological term, means bullying of an individual by a group, in any context, such as a family, peer group, school, workplace, neighborhood, community, or online. When it occurs as physical and emotional abuse in the workplace, such as "ganging up" by co-workers, subordinates or superiors, to force someone out of the workplace through rumor, innuendo, intimidation, humiliation, discrediting, and isolation, it is also referred to as malicious, nonsexual, non-racial/racial, general harassment.
Victims of workplace mobbing frequently suffer from: adjustment disorders, somatic symptoms, psychological trauma (e.g., trauma tremors or sudden onset selective mutism), post-traumatic stress disorder (PTSD), or major depression.
In mobbing targets with PTSD, Leymann notes that the "mental effects were fully comparable with PTSD from war or prison camp experiences." Some patients may develop alcoholism or other substance abuse disorders. Family relationships routinely suffer and victims sometimes display acts of aggression towards strangers in the street. Workplace targets and witnesses may even develop brief psychotic episodes occupational psychosis generally with paranoid symptoms. Leymann estimated that 15% of suicides in Sweden could be directly attributed to workplace mobbing.
Konrad Lorenz, in his book entitled On Aggression (1966), first described mobbing among birds and animals, attributing it to instincts rooted in the Darwinian struggle to thrive (see animal mobbing behavior). In his view, most humans are subject to similar innate impulses but capable of bringing them under rational control. Lorenz's explanation for his choice of the English word "mobbing" was omitted in the English translation by Marjorie Kerr Wilson. According to Kenneth Westhues, Lorenz chose the word "mobbing" because he remembered in the collective attack by birds, the old German term hassen auf, which means "to hate after" or "to put a hate on" was applied and this emphasised "the depth of antipathy with which the attack is made" rather than the English word 'mobbing' which emphasised the collective aspect of the attack.