- fear of pissing in large urinals that resemble a horse troff.
Usually found in large sporting venues the mega urinal provides zero privacy which causes many guys to be gun shy despite a bladder full of beer.
Friend: Hey were is your cousin the third inning is about to start?
You: Ah, he has to wait for a toilet since he has a bad case of troffaphobia.
You: Yeah, when he steps out to the plate at a big urinal he can't go.