1) (common)To clap 2 chalk board erasers together to clean them and create a cloud of chalk dust, often fun when students are board.
2) (slang) To clap dem cheeks of the class slut.
1) Hey Tom! Go outside the class and clap the erasers!
2) Damn Tom, you really clap the eraser! Dude shes a hoe anyways.
When I went to school in the 30’s, at the end of every day a couple of students were assigned to knock that day’s build up of chalk dust from writing on the blackboard. So, they would go outside and clap two erasers together for a couple of minutes to knock out the chalk dust.
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."