Definition of "dandiprat"

It seems but proper, every way, therefore, for us to know, that this king of poets and philosophers was also among the best of men ; that, in his character, modesty and humility kept pace with greatness ; and that he was as much better than the beau-ideals of our intellectual popinjays and dandiprats, as those beau-ideals were prouder than he.

1848, Henry Norman Hudson, Lectures on Shakespeare - Volume 1, page 41