The act of placing one's testicles over the bifocals of an unsuspecting victim. This is often performed to an individual who is asleep or unconscious, much to the delight of the assailant and spectators alike.
"Much to Jessie's chagrin, he woke up during class to find a pair of testicles covering the glasses he was wearing. Yanks had provided him with a complimentary pair of ballfocals"
by Yanks Gonna Give it to Ya May 16, 2006