slouch
The long, slouchy tunic shapes can be worn on their own as dresses or layered over jeans.
She looked as slouchy as any teenager.
This summer, shops are full of slouchy dresses that are as comfortable as tracksuits.
These fabrics work well with slouchy boots, or they can be dressed up with smarter high-heeled shoes.

SMART Vocabulary: related words and phrases

Style & appearance of clothes
aesthetic
alterable
anti-fur
Aran
backless
floor-length
flouncy
foppishly
form-fitting
French tuck
ready-to-wear
reversible
ribbed
ribby
ruche
voluminously
voop neck
waisted
washable
wasp waist

You can also find related words, phrases, and synonyms in the topics:

Flexible, loose and yielding
Not holding the body upright