Shut up, or I'll testefy you.
Kid 1: You're a jerk!
Kid 2: You have no balls *kicks kid 1 in groin*
Kid 3: You've been testefied by Kid 2!
To defile a target object or person using your scrotum sack, causing them to be immobilized with fear, giving you an unfair advantage over the victim.
That kids balls hang so low he testefies the grass when he walks.
Breaking news: Man dies from testefication.
The local testemorph testefied his dog and it died.