Fiacco

Fiacco is an Italian adjective used to describe someone or something that is weak, lethargic, or lacking energy. It can refer to physical stamina, mood, appetite, or the overall performance of a person or thing. In masculine usage, the form is fiacco; in feminine usage, fiacca; plural forms are fiacchi and fiacche. The term often conveys dullness, frailty, or subpar performance rather than acute illness.

Fiacco is commonly used in both formal and colloquial Italian. It can describe a person who feels weak, a day that feels slow or uninspired, a sports performance that is below par, or a product whose quality is unsatisfactory. Examples include una giornata fiacca, una prestazione fiacca, una salute fiacca, or un alimento o un prodotto fiacco per mancanza di gusto.

Fiacco is also encountered as a surname in Italian-speaking regions and among communities with Italian heritage. In such use, it is treated like any other surname and may appear in genealogical records and contemporary lists of names.