No problem, Hoju. I've made a similar - but far worse mistake.
I used to think the term "schmuck" was just another term for jerk and used it when I was doing public speaking engagements about scams and cons for my police department. After one such seminar, I was approached by a grinning older man who asked, "You're not Jewish, are you?"
"No," I replied. "Why do you ask?"
He said, "Because a schmuck is the piece of left over skin that the rabbi throws away when after he has performed a circumcision."
He walked away chortling, and I never used that term again (in public speaking).
There are two types of people in this world: Those who can extrapolate from incomplete data.