According to the search results, "a drag" can have different meanings depending on the context. Here are the different meanings:

• As a verb: "drag" means to pull something along a surface, usually the ground.
• As a noun: "drag" can refer to a device used to drag under water to detect or obtain objects.
• As an adjective: "drag" can refer to a person wearing clothing typical of the opposite sex.
• As an informal noun: "a drag" can refer to something or someone that is boring or unpleasant. For example, "Filling in forms is such a drag!" or "Dont be such a drag! Come to the party".

In summary, "a drag" can mean something boring or unpleasant when used as an informal noun.