When you saysomethingbad about someone.
Or when your with someone and you leave them.
Carla went shopping with Dave and when Carla saw Troy she went off with him and left Dave. Dave says to Carla that night "you need to stop dogging out on me".
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."