Used to politely tell someone that they just completely contradicted themselves. It can also be "Read that again, but slowly" if it's in text rather than actually being uttered.
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."