Malt liquors are a type of beer that's brewed with additional sugars, such as corn or rice, to boost the alcohol content. This category of beer usually has a higher ABV than standard beers, ranging from 6-9%. Some of the synonyms for malt liquors include strong beers, high-gravity beers, malt bombs, and heavy brews. Another term used to refer to malt liquors is "forties," which is derived from the 40-ounce bottles they're often sold in. While malt liquors may have a reputation for being low quality or cheap beverages, some craft breweries have been producing high-end versions of this style with unique flavors and ingredients.