give it mouth

give it mouth (third-person singular simple present gives it mouth, present participle giving it mouth, simple past gave it mouth, past participle given it mouth)

1. (UK, slang, archaic) Speak loudly; speak up.
   • 1860 December – 1861 August, Charles Dickens, chapter I, in Great Expectations […], volume I, London: Chapman and Hall, […], published October 1861, →OCLC, page 4:

     "Tell us your name!" said the man. "Quick!" / "Pip, sir." / "Once more," said the man, staring at me. "Give it mouth!"

• John Camden Hotten (1873) The Slang Dictionary