malapert
Cheeky, impudent, saucy.
archaic
The follest slouen ondyr heuen, / Prowde, peuiche, lyddyr, and lewde, / Malapert, medyllar, nothyng well thewde, […]
Where it comes from
From mal- (“not, badly”) + apert (“open, revealed; direct, straightforward; clever, expert”), or from Middle French malappert, Old French mal apert (“ill-skilled”).
Adapted from the Wiktionary entry malapert (CC BY-SA 4.0).