Pronounced: FROOM (oo as in hook), Origin: Yiddish, devout or pious, generally used to identify someone as Orthodox, or strictly observant of Jewish law.
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That is So Not Frum
It makes me insane when people say, “Hey, I know this Orthodox person who does X, so it must be ...
The 10 Best Yiddish Words You’ve Never Heard Of
These Yiddish terms aren't widely known, but they're a lot of fun to use.