We talked a lot about his past, including a very interesting social history.
He has had a wide assortment of experiences and, in the midst of our conversation, mentioned he has come across a number of "schmucks" and "menschen" over the years.
A quick check in a Yiddish dictionary, on my return to the office, allowed me to be more informed.
A mensch is a good person, a person of integrity and honor.
A schmuck is a prick, that portion of one's penis which is cut off during circumcision (the foreskin), a moron, an idiot, an obnoxious, contemptible or detestable person or one who is stupid or foolish.
I'm sure hoping he won't describe me as being a schmuck if any family members inquire how our visit went!