A teacher that does not mark a test for a long time after you have revised hardcore for it.
Me: Are you revising for this test?
Friend: No, the teacher likes moydening.
When you get told by a particular science teacher to revise for a test THE DAY BEFORE it happens and then have to wait 3-6 weeks for the test to be marked.
Me: Have you revised for that test?
Friend: No, she likes moydening anyway.