A gin and tonic is a highball cocktail made with gin and tonic water poured over a large amount of ice. The ratio of gin to tonic varies according to taste, strength of the gin, other drink mixers being added, etc., with most recipes calling for a ratio between 1:1 and 1:3. It is usually garnished with a slice or wedge of lime. To preserve effervescence, the tonic can be poured down a bar spoon. The ice cools the gin, dulling the effect of the alcohol in the mouth and making the drink more pleasant and refreshing to taste.
It is commonly referred to as a G and T in the UK, US, Canada, Australia, New Zealand and Ireland. In some parts of the world (e.g., in Germany, Italy, France, Japan, the Netherlands, Spain, Turkey), it is called a gin tonic (Japanese: ジン・トニック, Hepburn: jin tonikku). It is also referred to as ginto in the Netherlands, and as GT in the Nordics.
View More On Wikipedia.org