The word "sucks" is a slang term commonly used to express dissatisfaction or dislike about something. When someone says that something "sucks," they are indicating that it is bad, disappointing, or frustrating in some way.
The term "sucks" originally comes from the verb "suck," which means to draw in through the mouth, often referring to the action of consuming something. Its slang usage to express dissatisfaction or disparagement emerged in the late 20th century, particularly among younger generations.