When a teacher looks dresses up and looks like a chach and is talks naughtily on eharmony with another sex and calling their number only to have found out that a student had pranked him. May or may not like english breakfasts.

When a teacher befriends a person of interest over a form of medium and performing the act of exchanging intimate messages later to find out it was a student that he/she taught in school who was playing a prank on him/her.
Also known as the Bembi.