"Hard alcohol" refers to types of alcoholic drinks that have a higher alcohol content, such as spirits or liquors. These drinks can make you feel more intoxicated quicker than other alcoholic beverages like beer or wine. Full definition
Remember 1 drink is 5 ounces of wine, 1.5 ounces of hard alcohol, or 12 ounces of beer. (ultrawellnesscenter.com)
While I don't drink hard alcohol, throw it in food and I'm on board in a heartbeat. (dramaticpancake.com)
I don't really drink in excess, and hardly ever opt for hard alcohol when I do, so you can imagine how that turned out for me. (veggieandthebeastfeast.com)