The phrase "flowy bell" refers to something that is loose and flowing, like the shape of a bell. It typically describes clothing or fabric that billows or hangs loosely, often emphasizing a feminine or bohemian style. Full definition
This ivory top features an off shoulder neck, flowy bell sleeves, crochet detailing, and a sheer texture. (shopsiloe.com)
As the sleeves essentially drape off one or both shoulders, you can find a range of styles from flowy bell sleeve blouses smocked boho crop tops. (lotusboutique.com)
I started with a feminine Priyalla silk top with a clip - dot pattern, flowy bell sleeves, and constrasting black ribbon ties. (stylemba.com)