[Shellie-Ashton] Share definition Flag To be a shellie ashton is to be A dumb welsh person, This phrase is used mainly within englands westend. Dont be such a Shellie-Ashton. [Shellie-Ashton] by qrtyuioppoiuytrewqwqwertyuiop October 18, 2008 Get the [Shellie-Ashton] mug.