Knob nose 

Sticking your nose in about a dispute when you weren't even there and then being wrong

"Shut up you (knob nose), you weren't even there "

Knob nose by Jo peep September 30, 2015

Nose Knob

Zoology. A nose knob is the black part at the end of a dog’s face. Together with the snout it forms the nose of the dog.

I was sound asleep until my dog stuck her cold wet nose knob in my face.

Nose Knob by BeagleBagel September 27, 2018

Knob Nosed Bastard

Somebody who has a nose which resembles a mans penis.

Often found to have poor weed on there floors.

Tom Churchman is a knob nosed bastard

Knob Nosed Bastard by Jay Dee April 26, 2004