Definitions by Couch Potato

shifty's mouth 

To tell a lie or tall story. Originates from Rush Green in Romford, Essex. Shifty is a well known exaggerator from that area, and the term "Shifty's mouth" or " to Shifty" has also been heard as far as Ramsgate in Kent, England.

He told me he was at the pictures last night, "Shifty's mouth", he was with me all last night.

shifty's mouth by Couch Potato April 10, 2015