Agent noun of whip; a person or thing that whips.(noun)
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Use "whipper" in a sentence
"Lent; but his voice being so extremely musical, that it rather allured the birds than terrified them, he was soon transplanted from the fields into the dog-kennel, where he was placed under the huntsman, and made what the sportsmen term whipper-in."
"The examples are legion: caretaker, steamroller, gag, passing the torch, and domino theory are among them, though whip (abbreviation of the foxhunting term whipper-in) is not metaphorical in the sense often erroneously supposed."
"The rope arrested my fall what climbers call a whipper and I was pleasantly surprised to find that I hadn't broken or punctured anything."