The phrase used for a person who continues to muddle up common phrases with there own take, most commonly used in the North-West of England, especially Cheshire.
"We've been best friends since sliced bread" as opposed to "That's the best thing since sliced bread" Or "Alls I know is hows about your mum mwaa" As opposed to all I know is how your mum is" When somebody gets it wrong they've had a " Turnerism "