Definition & Meaning of "potty mouth"in English

What is the origin of the term "potty mouth" and how is it used?

"Potty mouth" is an informal English slang term that likely emerged in the mid-20th century, combining "potty" (a childish term for toilet or excrement) with "mouth" to describe a person who swears excessively or uses coarse, vulgar language. The term uses playful, metaphorical imagery to link speech with something considered dirty or improper. It is commonly used in informal conversation, parenting, and humor to criticize foul language, often in a teasing or mildly disapproving way. The term is mildly derogatory but generally not deeply offensive, emphasizing habit rather than moral failing.