Cuckolder

noun

Definitions

Noun
  1. 1
    A male of certain kinds of fish that interrupts a mating pair to release sperm in an attempt to fertilize the female.
  2. 2
    One who commits cuckoldry; one who cuckolds.

    "The friends of the respective parties, those of the cuckolder on one side, and those of the cuckoldee on the other side; and the public (as far as play-house audiences are the public) have fairly decided in favour of the cuckolder! What an admirable system of “public instruction”!"

Etymology

From cuckold + -er.

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