Awww rats!

A Brooklyn cop was outmaneuvered by a rodent Wednesday when he tried to stomp on the varmint — ​and ​got an eyeful of ammonia for his troubles.

The officer was hunting the pest in the Police Service Area 3 station house on Central Avenue in Bushwick at 12:30 when he tried to step on the animal, but instead crushed a jar of ammonia, which splashed into his eyes, police said.

He was taken to Wyckoff Heights Medical Center in stable condition to have his eyes flushed, officials said.