changeup

or change-up

[ cheynj-uhp ]
/ ˈtʃeɪndʒˌʌp /

noun Baseball.

a pitch that follows one or more fastballs, delivered with the same motion as for a fastball but with less speed, intentionally disrupting the batter’s timing: He knows how to use his changeup to keep hitters off balance.

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Origin of changeup

First recorded in 1940–45
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2020

British Dictionary definitions for changeup

change up

verb

(intr, adverb) to select a higher gear when driving

noun change-up

baseball an unexpectedly slow ball thrown in order to surprise the batter
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012