Wiktionary
n. baggy, long pants tapered at the ankle, with side flaps on the hip that button at the waist area
Wikipedia
Harem pants or harem trousers are baggy, long pants caught in at the ankle. Early on, the style was also called a harem skirt. The original so-called 'harem pants/skirts' were introduced to Western fashion by Paul Poiret around 1910, although they themselves were inspired by Middle East styles, and by şalvar ( Turkish trousers). The term 'harem pants' subsequently became popular in the West as a generic term for baggy trousers caught in at the ankle that suggest the Turkish style, or similar styles such as bloomers, the South Asian shalwar and patiala salwar; the Bosnian dimije; sirwal (as worn by Zouaves); and the Ukrainian sharovary.
Usage examples of "harem pants".
Deft as Captain Stefan might be aboard a kite, he could not get her harem pants down fast enough.
Kore still had on her leather flying jacket, over harem pants and hawking boots, making her feel less like death incarnate, and more like a child, running in all disheveled and dressed for play, telling her Mother a terrible story.
He was wearing glittering blue harem pants with a matching vest and shoes.
Indeed, half of her second chin had disappeared, and the lovely little roll of belly below her amethyst-encrusted lavender bra and bolero and above the amethyst-studded band of the diaphanous lilac harem pants she wore was eclipsed from its usual full moon to little more than a quarter.