Dimethyl Sulfide (DMS) is a common off flavor reminiscent of cooked cooked corn or cooked green veggies. In some beers, this is characteristic of the style. In others, it can be a result of poor sanitation or bacterial infection, and can mimic the flavor of cooked, canned or even rotting vegetables. Common vegetal flavors include cabbage, asparagus, canned green beens. In darker beers, it can come off as tomatoey. #sensoryschool #craftbeer #tastingbeer sources: How to Brew, Tasting Beer.