Refers to the hips or buttocks area. Often used in fashion, fitness, and body-shape contexts.
She has big hips.
My hips are big, so finding jeans that fit is tough.
This exercise is effective for lifting the buttocks.
Slang meaning fashionable, stylish, or in the know. Often used in casual conversation about people, places, or things.
That café has a really hip atmosphere.
He always wears hip clothes.
That shop is popular with hip young people.
I measured my hip size before buying clothes.
腰 specifically means the waist/lower back, whereas ヒップ refers to the hips and buttocks area, so learners often mix up which body part each covers.
ヒップ refers only to the hip measurement, while スリーサイズ names all three body measurements as a set.
Borrowed from English 'hip'. The body-part sense comes from 'hip', while the slang sense comes from the English slang 'hip' meaning trendy or cool.