noun
entire human body; every inch of one's body
A yojijukugo emphasizing the whole body, including hair and skin. Often used in contexts of filial piety or self-care, as in the Confucian idea that one's body is a gift from one's parents.
身体髪膚、これを父母に受く。あえて毀傷せざるは、孝の始めなり。
The body, hair, and skin are received from one's parents; not daring to injure them is the beginning of filial piety.
From the opening of the Classic of Filial Piety (孝経). The phrase is a fixed yojijukugo combining 身体 (body), 髪 (hair), and 膚 (skin).