Seersucker is a light cotton cloth. The surface is not flat: it has a pattern of lines, and those lines feel a little uneven — some bits sit up, some sit down — so a shirt made of it does not stick to your skin in hot weather. People use it for summer shirts, dresses, and suits. In the United States a blue-and-white seersucker suit is a well-known hot-weather look, a bit old-fashioned and cheerful. The word names the cloth, and people also use it for clothes made of that cloth. It is an ordinary clothes word, not slang, and not a joke about a person. Though actually, the English spelling looks like seer plus sucker, but that is only how the letters settled; the cloth itself is the real meaning, and you will meet the word in shops, sewing, and summer-dress talk more than in everyday chat about other things.

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