It's when you get sooooo bored that you decide that qwertyuiopasdfghjklzxcvbnm or mnbvcxzlkjhgfdsapoiuytrewq is't good enough to satisfy your boredness any more so you decide to type down diagonally not repeating any letters until you get to g.
Person 1: I'm so bored
Person 2: Search qwertyuiopasdfghjklzxcvbnm then.
Person 1: Done that
Person 2: How about mnbvcxzlkjh-
Person 1: Done that too
Person 2: Maybe if you try qpalzmwoskxneidjcnrufhvbtyg?
Person 1: Now that's a good idea :)