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Models for metallic anti-ferromagnets map to the dissipative XY model as do XY ferromagnets, the superconductor-insulator transition, and the model for loop-current order in Cuprates. The spectral function of the quantum-critical fluctuations for this model in 2D for a range of parameters is determined by topological defects - warps and 2D vortices; it is a separable function of space and time, with a 1/Ï„ dependence at criticality. The marginal fermi-liquid properties for the fermions follow from coupling to such fluctuations.