solecism
noun /ˈsɒlɪsɪzəm/
/ˈsɑːlɪsɪzəm/
(formal)- a mistake in the use of language in speech or writing
- an example of bad manners or unacceptable behaviour
- a social solecism
Word Originmid 16th cent.: from French solécisme, or via Latin from Greek soloikismos, from soloikos ‘speaking incorrectly’.