Definition of Noilly Prat in US English:

Noilly Prat

(also Noilly, Prat)

noun

  • A trademark for: a kind of French vermouth; a drink of this.

Origin

Early 20th century; earliest use found in Hatch, Mansfield Price List. From the name of Joseph Noilly and Louis Noilly + the name of Claudius Prat, 19th-cent. French vermouth manufacturers.