A casual American or Canadian corruption of the term "Indian", referring to Native Americans. The earliest Europeans thought they had landed in India and applied "Indian" to the indigenous population. "Injun" more commonly heard during a period when the term "Indian" was used, often pronounced in later years only by children. Not typically meant as derogatory, as American "Indians" came to be admired during the latter period of common usage. Rarely used today, if so used in a typically light-hearted if politically-incorrect fashion. Can be derogatory given intent and inflection.

Voluntarily Celibate.
A person who chooses to be celibate. Can be for any given amount of time, for a short period or for their entire life. Can be for religious reasons or not.

related: incel

n. derogatory term for a native american.

a redneck term for indian (the native american kind)

Racist slur toward a person of native american heritage.

See also ijin ; it's spelt this way so that it doesn't sound like it's mistaken for "engine".