Also found in: Idioms, Wikipedia.
tal·ly·whack·eror tal·ly·wack·er (tăl′ē-wăk′ər, -hwăk′-)
n. Vulgar Slang
[Alteration (probably influenced by whack) of earlier tallywag, perhaps from tally, counterpart, something that fits another thing + wag.]
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.