INDECORUM

indecorum. Indecorum, n. indecency, impropriety

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In′de‐co″rum (?), n. [[Pref. in- not + decorum: cf. L. indecorous unbecoming.]] 1. 1. Want of decorum; impropriety of behavior; that in behavior or manners which violates the established rules of civility, custom, or etiquette; indecorousness.
2. 2. An indecorous or unbecoming action. Young.
Syn. — Indecorum is sometimes synonymous with indecency; but indecency, more frequently than indecorum, is applied to words or actions which refer to what nature and propriety require to be concealed or suppressed. Indecency is the stronger word; indecorum refers to any transgression of etiquette or civility, especially in public.