Green’s Dictionary of Slang

fashionably or showily; thus kiddily togged, smartly dressed.

1823		‘Jon Bee’ Dict. of the Turf, the Ring, the Chase, etc. 109: An old evergreen chap may be dressed kiddily, i.e. knowingly, with his hat on one side, shirt-collar up on high, coat cut away in the skirts, or outside breast-pockets, a yellow bird’s-eye blue or Belcher fogle, circling his squeeze and a chitterling shirt of great magnitude.
1824		J. Wight Mornings in Bow St. 96: [A] diminutive, forked-radish sort of a young man, very fashionably attired, or, as he would say, kiddily togg’d.
1859, 1860		Hotten Dict. of Modern Sl. etc.
1873		Sl. Dict.