- a variation of wack.
whack
1 Americanverb (used with object)
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to strike with a smart, resounding blow or blows.
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Slang. to divide into or take in shares (often followed byup ).
Whack the loot between us two.
verb (used without object)
noun
verb phrase
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whack out to produce quickly or, sometimes, carelessly.
She whacks out a short story every week or so.
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whack off
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to cut off or separate with a blow.
The cook whacked off the fish's head.
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Slang: Vulgar. to masturbate.
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idioms
noun
verb
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to strike with a sharp resounding blow
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informal (usually passive) to exhaust completely
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informal (tr; usu foll by in or on) to put something on to or into something else with force or abandon
whack on some sunscreen
noun
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slang (tr) to murder
if you were out of line you got whacked
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a sharp resounding blow or the noise made by such a blow
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informal a share or portion
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informal a try or attempt (esp in the phrase have a whack at )
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informal out of order; unbalanced
the whole system is out of whack
interjection
Other Word Forms
Derived Forms
Inflected Forms
Participles
Conjugated Forms
Present
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whacksimple
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whackssimple
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have whackedperfect
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has whackedperfect
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am whackingprogressive
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are whackingprogressive
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is whackingprogressive
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have been whackingperfect progressive
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has been whackingperfect progressive
Past
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whackedsimple
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had whackedperfect
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was whackingprogressive
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were whackingprogressive
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had been whackingperfect progressive
Future
Etymology
Origin of whack
First recorded in 1710–20; originally dialect, Scots form of thwack; cf. whang 2, whittle
Example Sentences
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
Scotland have brought the party to the United States, and it was maybe this influence that prompted the DJ to whack on Freed From Desire.
From BBC • Jun. 27, 2026
“We have a red-flag system here, where if there’s anything that gets really out of whack, they can immediately tag the milk, and it doesn’t go to anything but cheese,” McAfee told me.
From Salon • Jun. 22, 2026
A bright sky is a signal that it’s daytime, so getting that signal at night throws all of that out of whack.
From Los Angeles Times • May 8, 2026
Trump later told reporters that a gunman he described as a "lone wolf" and a "whack job" had charged through security screening just outside the ballroom.
From Barron's • Apr. 26, 2026
He lets out a laugh, and I automatically duck, thinking that mischievous glint in his eyes means he’s going to whack me upside the head.
From "King and the Dragonflies" by Kacen Callender
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Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.