Globally pass variable

Is it possible to specify variable for a module to use it in every call of that module?

E.g i have multiple calling to docker and docker_image modules inside playbook, but since i have a mac with docker inside VM, i should pass docker_url variable on EACH call of docker module.
Is it possible to define variable that will be used by every module automatically or redefine defaults for module?

It is not possible to do this.