apophallation: eating dick, literally … as in, off!
apofellatio : getting off task, losing focus,
particularly near the finish
One of these is a real word, the other ought to be. You go figure. I could give you links—I could even post videos—but reverting to the generally high(er) tone of this blog's entries, I'll refrain. ("Desist" might be the more appropriate term given recent uproar, but I'm not taking down the Tiny Alice hyena video!)