plqaokwsijeduhrfygtzxcvbnm is when your sitting in class, bored out of your mind, and have already typed qwertyuiopasdfghjklzxcvbnm and mnbvczlkjhgfdsapoiuytrewq so now you try and find some combination that that no one has defined yet.
beat you to it
Josh was so bored he typed plqaokwsijeduhrfygtzxcvbnm and now he's bored and upset