酸葡萄汁是用生葡萄榨制而成的酸味浓厚的果汁。有时也可加入柠檬汁、酢浆草汁等调味。在中世纪的欧洲，酸葡萄汁被广泛用于制作调味酱汁或腌制食物。

英文Verjuice一词来源于中古法语 vertjus，意即“绿色果汁”。

Verjuice (/ˈvɜːrˌdʒuːs/ VUR-jooss; from Middle French vertjus "green juice") is a highly acidic juice made by pressing unripe grapes, crab-apples or other sour fruit. Sometimes lemon or sorrel juice, herbs or spices are added to change the flavour. In the Middle Ages, it was widely used all over Western Europe as an ingredient in sauces, as a condiment, or to deglaze preparations. It is still used to some extent in the American South.