Grammar nazi/spelling nazi or grammar pedant/spelling pedant is a term for a pedant who compulsively criticizes or corrects others' grammar mistakes, typos, misspellings, and other errors in speech or writing. The term originated in 1990s discussion forums as a way to insult those who overly correct others' grammar. "Grammar Nazis" often correct mistakes humorously, though this can reinforce arbitrary standards of linguistic correctness. These corrections often reflect literacy privilege. The term is often criticized for being a lighthearted use of the word Nazi. Grammar nazis are often criticized...

In the English language, there are grammatical constructions that many native speakers use unquestioningly yet certain writers call incorrect. Differences of usage or opinion may stem from differences between formal and informal speech and other matters of register, differences among dialects (whether regional, class-based, or other), and so forth. Disputes may arise when style guides disagree with each other, or when a guideline or judgement is confronted by large amounts of conflicting evidence or has its rationale challenged. == Examples == Some of the sources that consider some of the following...