From Wiktionary, the free dictionary
Borrowed from Yiddish חלף (khalaf), from Hebrew חַלָּף (khaláf).
chalaf (plural chalafs or chalefim)
- A knife used by Ashkenazi Jews in shehitah, the kosher slaughter of animals.
2021, Aden Polydoros, The City Beautiful, Inkyard Press, →ISBN, page 301:When Mr. Katz came back around to face me, he held a slaughterer’s chalaf. My breath escaped in a thin whimper before I could stop myself.