畜生道
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しょ
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Meanings
1
animal realm
Buddhist term: one of the six realms of rebirth (六道), where beings are driven by instinct and ignorance.
See also: 六道
In Buddhism, it is taught that accumulating bad karma leads to rebirth in the animal realm.
2
unforgivable act; indefensible lifestyle; incest
Figurative extension: a morally depraved state or act, likened to the animal realm. Sense 3 (incest) is a specific, rare usage.
Such an act is truly unforgivable.
His way of life was utterly depraved.