faulty grammar

noun

Roget 568: solecism; bad grammar, false grammar, faulty grammar; slip of the pen, slip of the tongue; lapsus linguae [Lat.]; slipslop^†; bull; barbarism, impropriety.   

verb

Roget 568: use bad grammar, faulty grammar; solecize^†, commit a solecism; murder the King's English, murder the Queen's English, break Priscian's head.   

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