An underground practitioner of extreme body modifications, such as castration, subincisions, hood removal and other such bod mods. As few surgeons or doctors will perform such procedures, others are willing to step in without the troublesome question of medical license and malpractice. Formal medical education is the exception, but most cutters are very skilled in what they do.

Alternatively, someone who cuts into the the skin into their skin or the skin of others. The reasons behind this can range from scarification, an aesthetic modification similar to tattooing popular among melanin-rich ethnic groups and certain SM lesbian subcultures, release, as a fair amount of people find the act relaxing and a way to reassert control over their lives, and self-injurious behavior or SIB, where the cutting becomes a dangerous obsession that needs to be checked through therapy.