colt evil

The Colt-evil is a continued Stiffness in a Horse's Yard, and is so call'd, because it is a Disease incident to Colts, and is brought upon them by having full Liberty with Mares while they are not able to cover them […]

young folks most apt to love, and by their good wills, saith Lucian, ‘would have a bout with every one they see’: the colt's evil is common to all complexions.