  We consider a model of the Universe with variable G and {\Lambda}. Subject of
our interest is a phenomenological model for {\Lambda} proposed and considered
in this article first time (up to our knowledge). Modification based on an
assumption that ghost dark energy exists and Universe will feel it through
{\Lambda}. In that case we would like to consider possibility that there exist
some unusual connections between different components of the fluids existing in
Universe. We would like to stress, that this is just an assumption and could be
very far from the reality. We are interested by this model as a
phenomenological and mathematical and unfortunately, we will not discuss about
physical conditions and possibilities of having such modifications. To test our
assumption and to observe behavior of the Universe, we will consider toy models
filled by a barotropic fluid and modified Chaplyagin gas. To complete the logic
of the research we will consider interaction between barotropic fluid or
Chaplygin gas with ghost dark energy as a separate scenario. Statefinder
diagnostic also provided with stability analysis of the models. All free
parameters of the model fixed to satisfy generalized second law of
thermodynamics.
