Толковый словарь английского языка Oxford English Reference - piping

n. & adj. --n. 1 the act or an instance of piping, esp. whistling or singing. 2 a thin pipelike fold used to edge hems or frills on clothing, seams on upholstery, etc. 3 ornamental lines of icing, cream, potato, etc. on a cake or other dish. 4 lengths of pipe, or a system of pipes, esp. in domestic use. --adj. (of a noise) high; whistling. Phrases and idioms piping hot very or suitably hot (esp. as required of food, water, etc.).