Anyone who is into fashion or Sex and the City knows about the time when Carrie fell flat on her face in the middle of the runway during the fashion show. So that's what it is its when you fall in the middle of the runway during a fashion show.
A small piece of information. Derived from the word ken, used often in the scottish language and is synonymous with knowledge.
Person 1: "Hey I don't get this shit. How do you solve this problem?"
Person 2: "I got that one. Give me some kenlets on this assignment and I'll help you w/ that one."