squirrelliness noun4 •The state or trait of being squirrelly. •(figurative) Unpredictability or jumpiness.The fifth-graders are in the gymnasium, working off some of their squirrelliness. •(figurative) (of a person) Eccentricity.He's quite reliable even though occasionally he exhibits some squirrelliness for fun. •The essence of a squirrel's nature.He's so cute I want to squeeze him — his tail, his little ears, his absolute squirrelliness! formssquirrellinesses