An expression used by people who have a pet cause, and don't want anyone questioning that cause. A fast way to shut down a conversation from anyone deemed too outside to participate, no matter what their level of qualifications.
"Don't go telling me to vaccinate my kids when you don't have any. Stay in your lane."
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."