Русско-англо-русский юридический словарь

The term enemy of the people or enemy of the nation, is a designation for the political or class opponents of the subgroup in power within a larger group. The term implies that by opposing the ruling subgroup, the "enemies" in question are acting against the larger group, for example against society as a whole. It is similar to the notion of "enemy of the state". (Wikipedia)

Being branded an "enemy of the people" by the likes of Stalin or Mao brought at best suspicion and stigma, at worst hard labour or death. (BBC News)