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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.
perk verb [ I/T ] (MAKE COFFEE) âº (of boiling water or coffee) to move up a tube in a percolator (= a type of container for making coffee) when the coffee is being made: [ I ] The coffee had begun to perk.