also: どろぼうネコ
thieving cat
Literal meaning: a cat that steals food. Often used when a cat sneaks into a house or kitchen to take food.
A thieving cat came into our garden and ate the dried fish.
homewrecker; adulterer
Derogatory term for a person (usually a woman) who steals someone else's spouse or lover. The image is of a cat sneaking in to steal.
She's called a homewrecker for stealing her friend's boyfriend.