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Adjective: indecorous  in'de-ku-rus
  1. Lacking propriety and good taste in manners and conduct
    "indecorous behaviour";
    - indelicate
  2. Not in keeping with accepted standards of what is right or proper in polite society
    "indecorous behaviour";
    - indecent, unbecoming, uncomely, unseemly, untoward

See also: improper, indecent

Antonym: decorous

Encyclopedia: Indecorous