discourtesy
(noun)
noun
1. an expression of lack of respect
Similar word(s): disrespect
Definition categories: communication, content, message, substance
2. a manner that is rude and insulting
Similar word(s): rudeness
Definition categories: attribute, manner
3. a lack of politeness; a failure to show regard for others; wounding the feelings or others
Similar word(s): offence, offense
Definition categories: act, behavior, behaviour, conduct, doings