Background: When the word "narf" was first utilized, it referenced the animated series Pinky and the Brain. Since the term "narf" from aforementioned animated series is cool, it is the "shit".
A narf-bucklet is a euphemism of a fart, shit pellet or ass raisin. People who are rude are shitheads, or little shits, hence, narf-bucklet.
"Aw fuck him, he's just a narf-bucklet."
2. "That narf-bucklet needs to watch his mouth"
3. "Grow up! You're acting like a narf-bucklet."