Definition & Meaning of "ass face"in English

What is the origin of the term "ass face" and how is it used?

Ass face is a slang term that appeared in mid–20th-century English to describe a person regarded as having an unattractive, foolish, or contemptible face. The term combines "ass" (used as a general insult) with "face," creating a blunt and crude way to demean someone's appearance. Historically, it was derogatory, used to mock or insult, often in aggressive or joking contexts. Today, it remains offensive and vulgar, and using it in conversation is likely to provoke insult or humor depending on context.