Jammy
The natural berrylike taste of the grape.

Jerez y Manzanilla (Spain)
The Denominación de Origen in Spain famous for its dry and sweet fortified wines collectively known as Sherry. Common types of Sherry include Fino, Manzanilla, Amontillado and Oloroso. Less common types include Palo Cortado.

Jeroboam
A large format wine bottle. In Bordeaux it is equivalent to six standard bottles, but in Burgundy and Champagne a Jeroboam contains the equivalent of a mere four bottles (a double magnum in Bordeaux).

Judging Wine
An extension of wine tasting where you use your sensory perceptions of sight, smell, and taste as a basis for evaluating the quality of wines.