The story
Partial calque of Yiddish האַלטן כּשר (haltn kosher, “to keep kosher”).
Etymology from Wiktionary, CC BY-SA 4.0.
keep kosher
Today it means: to observe the rules of kashrut (Jewish dietary laws) Full definition →
Today it means: to observe the rules of kashrut (Jewish dietary laws) Full definition →
Partial calque of Yiddish האַלטן כּשר (haltn kosher, “to keep kosher”).
Etymology from Wiktionary, CC BY-SA 4.0.