Definitions for "Solecism"
An impropriety or incongruity of language in the combination of words or parts of a sentence; esp., deviation from the idiom of a language or from the rules of syntax.
Any inconsistency, unfitness, absurdity, or impropriety, as in deeds or manners.
a mistake of grammar or of idiom
an ungrammatical combination of words in a sentence, or a minor blunder in speech, or something deviating from the proper, normal, or accepted order
Keywords:  tactless, awkward, socially, act
a socially awkward or tactless act
A substandard usage, usually an inadvertent slip.