It's normally used in alcohol specifically to refer to liquid with low fermentable sugars remaining, typically meant that it's been fermented "fully". Beers like Japanese lagers have both low fermentable and (mostly) non fermentable sugars left (and are tasty)

Source: former process engineer in a brewery

Monster Nitro refers to Monster Nitro Super Dry, an energy drink that uses nitrous oxide for a smooth, creamy, and "dry" texture and a citrus flavor. It contains a classic Monster energy blend, including caffeine, taurine, and B-vitamins, to provide an energy boost. The drink is packaged in 16-ounce cans and has a unique, light, and fizzy feel similar to fine champagne.

They make an alcoholic Monster. Called Beast Unleashed.

The best part is that it just tastes like a normal Monster. But they removed the caffeine, unfortunately.

Its not about the suggar in this case. Its carbonated with Nitrogen (oxide?), like the Guiness. Gives a different mouth feel.