The phrase 'slim hips' is correct and usable in written English.
For example, you could use it in a sentence such as "She had a slender frame with slim hips and a small waist."
He will be a dark saturnine young man with slim hips like yours.
She sneered, she swiveled her slim hips, and then she started to sing Talking Heads' "Psycho Killer" in Japanese.
Mr. Dolan is compact, seemingly shorter than his 5 feet 7 inches, with slim hips and a helmet of half-moon curls.
Her reaction may, thus, be one of anger and resentment, if she happens to live in a society in which slim hips are considered essential to feminine beauty.
He smiled as Mr. Aviles did a pirouette in his purple lame gown (size 8), showing off cleanly shaven legs, slim hips and stiletto pumps.
On swelteringly hot summer weekend charettes when Lou occasionally worked shirtless, it was hard not to notice how unusually broad his lightly freckled shoulders were in proportion to his slim hips.
For day, the dominant look was a pencil skirt worn with a vibrant silk shirt and slim, hip length jacket.
From his first day he dazzled us with his long rock-star hair and slim, hip jeans, but mostly we were struck by his passion for magazines.
She wore baggy, oversize boyfriend-y jeans suspended above her super-slim hips by little more than a casual canvas belt and a prayer, and she was surprisingly smiley.
Women with one particular "allele", or version, of the gene tend to have slimmer hips, while women with another are more "pear-shaped", the study claimed.
Exercise also helps you slim your hips and build up your hippocampus.
