The Collaborative International Dictionary of English v.0.48:

Waggery \Wag"ger*y\ (-g[~e]r*[y^]), n.; pl. Waggeries. [From
   Wag.]
   The manner or action of a wag; mischievous merriment;
   sportive trick or gayety; good-humored sarcasm; pleasantry;
   jocularity; as, the waggery of a schoolboy. --Locke.
   [1913 Webster]

         A drollery and lurking waggery of expression. --W.
                                                  Irving.
   [1913 Webster]

WordNet (r) 3.0 (2006):

waggery
    n 1: waggish behavior [syn: waggery, waggishness]
    2: a quaint and amusing jest [syn: drollery, waggery]