Sloe gin is a red-colored liqueur flavored with sloe berries, the fruit of the blackthorn, a relative of the plum. Sloe gin has an alcohol content from between 15 and 30 percent by volume.

The traditional way of making sloe gin was to infuse gin with the berries, after pricking or freezng them, but most sloe gins today are made by flavoring the less expensive neutral grain spirits.