People are debating what the end piece of bread is called

What do you call the end piece of a loaf of sliced bread? That is the debate this week created by the Twitter user @NoContextBrits. Heel.  Butt.  End.  Crust.  Knob.  Outside Slice.  And the oddest one of all, the scab. I just call it the sh*tty slice. In my house, it is also known as bird food.