The giant, inflatable rat that was stabbed outside the upscale Babbo restaurant in Manhattan this week is getting patched up — and its injuries were even worse than previously thought, The Post has learned.

On Thursday, the union that staged the ill-fated Monday protest at the grand reopening of the posh Italian eatery bought a patch from Home Depot to repair an 8-inch gash on the right thigh of “Scabby the Rat” that was allegedly cut by a knife-wielding assailant.

Members of Unite Here Local 25 brought the rat back to its headquarters in Washington, DC, for the procedure, union reps said. During inspection, they said they found yet another gash that was apparently inflicted Monday night — on the other side of the same leg, and even bigger than the first slash.

“It’s near the first on

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