Meaning: This adjective means not likely to get worried, nervous, or angry even in difficult situations.
Origin: The first known use of unflappable was in 1954, and it comes from a combination of un (“not”) + flap (“to upset, stir’) + -able. Here’s a trivia: Former British PM Harold Macmillan apparently had a reputation for being unflappable!
Example: There’s a warm heart beneath her unflappable exterior.
Picture Credit : Google