The phrase "poor chap" is a way to express sympathy or pity towards someone. It refers to a person who is seen as unfortunate or having a difficult time. Full definition
Sadly, even though the red flags are waiving all over the place, there is going to be a handful of poor chaps that will enter their info here, and likely have their account hijacked. (playstationlifestyle.net)
I recall in a church I went to how the same poor chap struggled year after year to make ends meet and still tried to tithe. (redeeminggod.com)
Poor chap didn't even express an opinion, just printed the interview and yet people disagreed with him. (justarsenal.com)