Object velocity affect vertex position in shader graph??

I am wanting to find a way to make the bottom of this Ghost character 'drag' behind as it moves about the world, if that's possible to do within the shader. It seems like it could be possible...maybe by somehow getting the objects velocity and subtracting a percentage of its value from the vertexes world position perhaps?

Currently I am influencing the bottom vertexes with a wobble effect (to look cloth-like) determined by vertex color.