A prank where you quickly close someone's laptop when they're not expecting it or in the middle of working with it. Ideally the laptop is set to hibernate or shut down when the lid is closed so they have to then reboot their computer.
Best practice is to shout 'Awww, lapslap!' when lapslapping someone.
"Fuck, I just got lapslapped and my computer takes ages to restart... and I didn't save my essay."
When you receive an email from a university, and the subject says "Your Student's Application is Now Complete" and the email is about a piece of your application being *incomplete*. The admissions offer is demonstrating laysloperism.
When you tell your students that topic 7 will not be on the test, and then when you take the test, you see that topic 7 has been put on the test by the same teacher which stated that it would not be on the test. The teacher is demonstrating laysloperism.