Inelegant

[Sarah]

Not elegant; deficient in beauty, polish, refinement, grave, orornament; wanting in anything which correct taste requires.What order so contrived as not to mix Tastes, not well joined,inelegant. Milton.It renders style often obscure, always embarrassed and inelegant.Blair.

[Becky]

Having or showing a lack of physical grace, elegance, or refinement.

[Luis Fok]

not attractive, especially because of being awkward in movement or manner: