Sloe/sləʊ/ Definition 1 of 2Pro Tip 1/3Culinary Uses Sloes are often used to make jams, jellies, and especially sloe gin. They make their own sloe gin every autumn. Pro Tip 2/3Bitter Taste Fresh sloes have a sharp, sour taste and are usually not eaten raw. The sloe's bitter taste softens after the first frost. Pro Tip 3/3Seasonal Activity Sloe picking is done in late autumn, often after the first frost. We planned a sloe picking trip in November.