inelegant -
lacking in refinement or grace or good taste
elegant refined and tasteful in appearance or behavior or style; "elegant handwriting"; "an elegant dark suit"; "she was elegant to her fingertips"; "small churches with elegant white spires"; "an elegant mathematical solution--simple and precise and lucid"
untactful,
tactless lacking or showing a lack of what is fitting and considerate in dealing with others; "in the circumstances it was tactless to ask her age"
unrefined (used of persons and their behavior) not refined; uncouth; "how can a refined girl be drawn to such an unrefined man?"
gauche,
unpolished,
graceless lacking social polish; "too gauche to leave the room when the conversation became intimate"; "their excellent manners always made me feel gauche"
