「まいどあり」は何ですか。 What is the original meaning of the word "まいどあり" and when is it appropriate to use this word? Is it a very common word? * I've heard this word from a drama that I watched recently called "クロサギ". Here is clip of that: https://drive.google.com/file/d/0B8GdU2sVp7UNUlBpX0lOeUtldGM/edit?usp=sharing ありがとうございます。