  We study viscoelastic response in Weyl semimetals with broken time-reversal
symmetry. The principal finding is that topology and anisotropy of the Fermi
surface are manifested in the viscoelasticity tensor of the electron fluid. In
the dynamic (interband) part of this tensor, the anisotropy leads to a
qualitatively different, compared with isotropic models, scaling with frequency
and the Fermi energy. The components of the viscosity tensor determined by the
Fermi-surface properties agree in the Kubo and kinetic formalisms; the latter,
however, misses the anomalous Hall viscosity originating from filled states
below the Fermi surface. The anisotropy of the dispersion relation is also
manifested in the acceleration and relaxation terms of the hydrodynamic
equations providing means to probe the anisotropy in transport experiments.
