A martini is considered "dirty" when olive brine-the salty juice from a jar of olives-is added to the traditional mix of gin or vodka and dry vermouth. This addition of olive brine imparts a savory, salty flavor that distinguishes the Dirty Martini from a classic or dry martini

. Key points about what makes a Dirty Martini:

• Olive brine : The defining ingredient that "dirties" the martini, providing saltiness and a briny, savory character that complements and softens the dryness of the vermouth and the botanicals of the gin or the neutrality of vodka

• Spirit choice : Both gin and vodka are used, but vodka is often preferred in Dirty Martinis because its neutral flavor allows the olive brine to stand out more prominently

• Garnish : Typically served with one or more olives, often stuffed, which also contribute flavor and aroma

• Preparation : Some bartenders shake the cocktail with ice to chill and dilute it slightly, while others prefer stirring to maintain clarity and texture

In essence, a Dirty Martini is a classic martini made "dirty" by the addition of olive brine, which adds a distinctive salty, savory dimension to the drink