Phantom without UV pathology

We present a simple model in which the weak energy condition is violated for spatially homogeneous, slowly evolving fields. The excitations about Lorentz-violating background in Minkowski space do not contain ghosts, tachyons or superluminal modes at spatial momenta ranging from some low scale ǫ to the UV cutoff scale, while tachyons and possibly ghosts do exist at p2 < ǫ2. We show that in the absence of other matter, slow roll cosmological regime is possible; in this regime p+ρ < 0, and yet homogeneity and isotropy are not completely spoiled (at the expence of fine-tuning), since for given conformal momentum, the tachyon mode grows for short enough period of time.