Troff is the opposite to peak. Just like on a graph you have the peak, you also have the trough, or 'troff'. The peak is the best as it is the top, and the 'troff' is the worst as it is at the bottom. This therefore means that if something is 'troff' it is the worst it can possibly be.
Harry: Jack, I'm listening to some music about putting a pigeon in a box and sending it off to Rome, It's peak!
Jack: No, Harry, that music is troff, very troff indeed. errr.
- 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.
Friend: What?
You: Yeah, when he steps out to the plate at a big urinal he can't go.