If we're going by the English dictionary defintion of the word 'dillies', we're saying said dilly is a good example of a particular type of thing.
In the case of Marni's Dillies Gabardine Jacket, it's got a serious case of the dillies, because this jacket is insane. And that's for a number of reasons.
First of all, Marni's Dillies print (the bold flowers) brings this bad boy to life with an amazingly red and white contrast, with the silhouette sporting a relaxed, oversized shape. Making it even better is the equally oversized pockets and the customary metal flower button right at the collar.