A low-life (or lowlife) is a term for a person who is considered morally unacceptable by their community. Examples of people society often labels low-lives include aggressive panhandlers, bullies, criminals, drug dealers, freeloaders, hobos, gangsters, people who make constant use of profanities, prostitutes, pimps, scammers, sexual abusers and thieves.

Often, the term is used as an indication of disapproval of antisocial or destructive behaviors, usually bearing a connotation of contempt and derision. This usage of the word dates to 1911. The long-term origins of the ideas behind this in the Western world trace back to ancient times with the distinction of high culture associated with aristocracy at the top of the social hierarchy who were regarded in aristocrat-dominated society as compared with low culture associated with commoners at the bottom of the social hierarchy that included many impoverished people among them.

In common usage, the term can also be used for people associated with adhering to low culture, or used to describe a crass, overly casual person who exhibit a lack of grace and refinement. In this sense, individuals do not necessarily need to be criminally destructive or hold ethically questionable views to qualify for the term.

Similar terms used for the same type of person include the Australian/New Zealand term feral.