Puffer \Puff"er\, n. 1. One who puffs; one who praises with noisy or extravagant commendation. 2. One who is employed by the owner or seller of goods sold at suction to bid up the price; a by-bidder. --Bouvier. 3. (Zo["o]l.) (a) Any plectognath fish which inflates its body, as the species of {Tetrodon} and {Diodon}; -- called also {blower}, {puff-fish}, {swellfish}, and {globefish}.