or ma·zal tov
[ mah-zuh l tawv, tawf, tohv ]
/ ˈmɑ zəl ˌtɔv, ˌtɔf, ˌtoʊv /
an expression of congratulations and best wishes, used chiefly by Jews: A chorus of mazel tovs greeted the newlyweds as they circulated from table to table.
Congratulations!; Best wishes!: “Mazel tov,” Grandpa said as he thrust a five-dollar bill into my pocket. “I'm so proud of you!”
Origin of mazel tov
1860–65; < Yiddish mazltov < Hebrew mazzāl tōbh literally, good luck
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
1862, from modern Hebrew mazzal tob "good luck," from Hebrew mazzaloth (plural) "constellations."
Online Etymology Dictionary, © 2010 Douglas Harper