From Wiktionary, the free dictionary
sour beer (plural sour beers)
- Beer which has an intentionally acidic, tart, or sour taste.
2011, Garrett Oliver, editor, The Oxford Companion to Beer, OUP USA, →ISBN, page 744:The classic sour beer styles include the German Berliner Weisse, and the Belgian Oud Bruin, Flanders Red, and lambic beers.
beer with an intentional sour taste
