Conversation so far:
Was I dood it! a sketch by him?
Junior would say things like, If I dood it, I gets a whipping., followed moments later by the statement, I dood it!“
who played junior?
Skelton starred in a 1943 movie of the same name, I dood It!, but did not play Junior in the film.
Where did Red Skelton perform?
Skelton went on the air with his own radio show, The Raleigh Cigarette Program, on October 7, 1941.
What acts did Red Skelton perform on The Raleigh Cigarette Program?
Skelton introduced the first two of his many characters during The Raleigh Cigarette Program's first season.
Who were those characters Skelton introduced during the Raleigh Cigarette Program's first season?
The character of Clem Kadiddlehopper was based on a Vincennes neighbor named Carl Hopper, who was hard of hearing.
Who was the other based on?
The second character, The Mean Widdle Kid, or Junior, was a young boy full of mischief, who typically did things he was told not to do.
Did audiences like the shows or the characters Red Skelton played or wrote?
The phrase was such a part of national culture at the time that, when General Doolittle bombed Tokyo in 1942, many newspapers ran Doolittle Dood It as a headline.

Question: Which phrase?
Self-contained rewrite: Which phrase was such a part of national culture that it ran as a headline?