A rouche is a decorative frill or pleat of fabric, often found on clothing like shirts or dresses.
Rouches are often seen as fancy or stylish, and they can make clothes look more interesting.
Examples:
Her dress had a pretty rouche on the collar.
I like the rouche on this shirt.
The rouche on his shirt was very big and colorful.
The rouche on my shirt is so fancy, it looks like a present!
I saw a dress with a rouche that was as big as a bed!
The rouche on her dress was so big, it looked like a cloud.