  We present a hydrodynamical description of the QCD Dirac spectrum at finite
chemical potential as an uncompressible droplet in the complex eigenvalue
space. For a large droplet, the fluctuation spectrum around the hydrostatic
solution is gapped by a longitudinal Coulomb plasmon, and exhibits a
frictionless odd viscosity. The stochastic relaxation time for the
restoration/breaking of chiral symmetry is set by twice the plasmon frequency.
The leading droplet size correction to the relaxation time is fixed by a
universal odd viscosity to density ratio $\eta_O/\rho_0=(\beta-2)/4$ for the
three Dyson ensembles $\beta=1,2,4$.
