miscoin

/ˌmɪsˈkɔɪn/
verb
  1. To invent or create a word or phrase incorrectly or in a way that is not accepted.
    • Some advertisers miscoin words to make their products sound unique.
    • He miscoined the phrase 'unbreakable glass' before safety glass was invented.
    • The writer miscoined a term that never caught on with readers.
Synonyms
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