The waist of the trousers is too loose.; The trousers are too wide in the waist.

裤腰太肥了。

《新英汉大辞典》

Loose, wide trousers (we're talking wide - you should be able to carry 200 kg of rice in the leg!)

宽松的、肥大的裤子(我们说的是很肥大，裤腿可以盛下两百公斤的大米！)

youdao

It's designed for the latest fashion of wide-fronted sneakers that people usually wear loose with the LACES dragging.

这是专为最新的时装广为主导的运动鞋，人们通常穿宽松的鞋带拖。

youdao

Looks from 2010 that she lists among her favorites include androgynous menswear for women, such as those wide-lapeled suit jackets and loose slacks mimicking the wide-stride Yves St.

WSJ: Brightest��and Tightest��Fashions of 2010

He just failed to turn in an inviting cross, with England captain John Terry firing inches wide as the loose ball dropped at his feet 20 yards out.

BBC: England 4-0 Slovakia

Some establishments season the meat with spices, and at most of the Maid-Rite franchises now offer a wide range of loose meat variations including Philly, chili, bacon, and even a loose-meat wrap.

FORBES: Loose Meat Sandwich, Iowa