Definition & Meaning of "knobber"in English

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

"Knobber" is a British slang insult that developed in the late 20th century from "knob," a vulgar term for the penis that also came to mean a foolish or irritating person. Adding "-er" turns it into a label for someone seen as stupid, obnoxious, or contemptible. It is commonly used in informal speech, banter, and online arguments. The term is clearly derogatory but usually mild, often delivered with humor or irritation rather than serious hostility.