Adverb
In a saucy manner; impudently; with impertinent boldness.
Source: Webster's dictionaryHe skates saucily over great tracts of confessed ignorance. John Updike
Thus, statesmanlike, I'll saucily impose, And safe from action, valiantly advise; Sheltered in impotence, urge you to blows, And being good for nothing else, be wise. John Wilmot, 2nd Earl of Rochester
a lean, swarthy fellow was peering through the window, grinning impudently Source: Internet