In Star Trek's TNG episode, "Coming of Age" Wesley and Worf discuss facing their fears while on the USS Enterprise-D holodeck. But its not actually divulged what Worf's "secret fear" is. So lets make an educated guess.....
Could this be true? Do Tribbles really have what it takes to spook Warrior Worf?
Tribble long and Prosper, trekkers, trekkies and niners.