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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.
Phrasal Verbs: perk up To regain or cause to regain one's good spirits or liveliness.To refresh the appearance of: New furniture and paint perked up the room. Origin of perk. Possibly Middle English perken to perch from perk rod, perch probably from Medieval Latin perca and from Old French perche, perce both from Latin pertica rod; see perch 1.