solecism (noun) 

A solecism (SAHL-siz’m) is a minor grammatical error – a word or phrase that is used incorrectly or in a non-standard way. Examples: between you and me… whom shall I say is calling… the woman, she is here… he can’t hardly sleep. The word can also be used for something that deviates from the proper, normal, or accepted. As used by Will Self: “To purposely concoct older characters of a sunny disposition would be as much of a solecism as deliberately fabricating arrhythmic blacks, spendthrift Jews, slacker Japanese, and so on.”