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perk 1. v. perked, perkÂ·ing, perks. v. intr. 1. To stick up or jut out: dogs' ears that perk. 2. To carry oneself in a lively and jaunty manner. v. tr. To cause to stick up quickly: The dog perked its ears at the noise. adj. Perky.
(third-person singular simple present perks, present participle perking, simple past and past participle perked) To become more lively or enthusiastic. To exalt oneself; to bear oneself loftily. To make trim or smart; to straighten up; to erect; to make a jaunty or saucy display of. to perk the ears; to perk up one's head