Definition & Meaning of "shitmuffin"in English

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

"Shitmuffin" is a playful insult that emerged in informal English, likely in the late 20th century, combining "shit" (meaning disgusting or worthless) with "muffin" (a soft, innocuous food) to create a humorous but contemptuous label. The contrast between the harshness of "shit" and the silliness of "muffin" gives the word a light, mocking tone. It is used in casual conversation, often among friends or online communities, to call someone ridiculous, foolish, or unpleasant in a semi-joking way. While derogatory, it is usually seen as mild and not deeply offensive, leaning toward humorous ridicule rather than serious insult.