The Mornin'!' is a popular phrase used to express enthusiasm and excitement for the start of a new day. It is often used as a greeting or salutation by people who are looking forward to what the day will bring. The term 'The Mornin'!' is also the title of a song by American country singer Kenny Chesney, which was released in 2005. The crossword solution TOPO refers to this song and is an abbreviation for the title of the song, 'The Tin Man of Oz'.