coltishness noun3 •The quality of resembling a colt. •The quality of being lively, playful and undisciplined.But the day of halcyon October sun was too serene even for his coltishness and sedately they tramped up the hill, swinging their joined hands — 1927 •The quality of being tall, thin and awkward (usually of a young person).Though only a year younger than Reuben, in the midst of the awkward age, his growing limbs quite lacked the coltishness of his brother’s. — 1916
