The actions and emotions a person shows when they are on the toilet and trying to shit something big...and it hurts. Similar to the emotions and actions while preparing for a roller coaster dive with the rejoicing hand raise at the end (woohoo!).
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."