house-trained

This term describes a specific behavioral milestone in domestic animals, primarily dogs and cats, indicating they have learned the social and hygienic boundaries of a human living space. It carries a connotation of discipline and reliability, often serving as a key selling point or requirement when adopting a pet.

While the term is predominantly literal, it is occasionally used as a sarcastic metaphor for a person who has learned basic social etiquette or professional decorum. In such cases, it implies that the individual was previously uncouth or lacked basic social awareness.