=+he goes to that restaurant every day. The reason the agency creatives wrote “every day” as one word was for two reasons. First, they wanted the audience to read the slogan like a verbal logo. Second, people would absorb the slogan faster if there were only two words to digest.

Hence, “Toyota Everyday.”2 Even Leo Burnett, the advertising legend, agreed that “ain't” could be used if it precisely expressed the point.

Here's a much-quoted Burnett comment using “ain't”: