(n.) The quality or state of being pert.

activity aggressive self-confidence airiness animation ardor arrogance audacity bold front boldness bounce brash bearing brashness brassiness bravado brazenness breeziness brio briskness bumptiousness buoyancy carefreeness cheekiness chestiness chirpiness cockiness conceit conceitedness contempt contemptuousness daring daringness debonairness defial defiance defying derision despite disdain disregard elan enthusiasm glow gusto immodesty impertinence impetuosity impetus impudence insolence jauntiness joie de vivre levity life light heart lightheartedness lightness lightsomeness liveliness lustiness mettle obtrusiveness perkiness resilience robustness sauciness self-assertiveness self-conceit side spirit spiritedness swelled head swelled-headedness vivacity warmth zest zestfulness