noun
perianal area; anal region
Wasei-eigo term, primarily used in beauty and hair removal contexts to refer to the area around the anus. Not a standard medical term.
wasei-eigo (Japanese-coined English), from O line
Oラインの脱毛を考えている。
I'm considering hair removal for the perianal area.
サロンでOラインの施術を受けた。
I had a treatment for the perianal area at the salon.