Definition
When you say 'least of all', you're emphasizing that something is the *last* thing you'd expect or want. It highlights the extreme unlikelihood or undesirability of a particular option compared to others. Think of it like ranking your favorite foods; 'least of all' would be the one at the very bottom of your list. It's used to single out something as the *most* improbable. For example, someone failing a test after diligently studying. It indicates a significant contrast or exception. It often implies surprise or disbelief.