Dictionary.com
Thesaurus.com
Synonyms

whack

1 American  
[hwak, wak] / ʰwæk, wæk /

verb (used with object)

  1. to strike with a smart, resounding blow or blows.

  2. Slang. to divide into or take in shares (often followed byup ).

    Whack the loot between us two.


verb (used without object)

  1. to strike a smart, resounding blow or blows.

noun

  1. a smart, resounding blow.

    a whack with his hand.

  2. Informal. a trial or attempt.

    to take a whack at a job.

    Synonyms:
    turn, go, try
  3. Slang. a portion or share.

verb phrase

  1. whack out to produce quickly or, sometimes, carelessly.

    She whacks out a short story every week or so.

  2. whack off

    1. to cut off or separate with a blow.

      The cook whacked off the fish's head.

    2. Slang: Vulgar. to masturbate.

idioms

  1. out of whack, out of order or alignment; not in proper condition.

whack 2 American  
[hwak, wak] / ʰwæk, wæk /

noun

  1. a variant of wack.


whack British  
/ wæk /

verb

  1. to strike with a sharp resounding blow

  2. informal (usually passive) to exhaust completely

  3. 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

"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

noun

  1. slang (tr) to murder

    if you were out of line you got whacked

  2. a sharp resounding blow or the noise made by such a blow

  3. informal a share or portion

  4. informal a try or attempt (esp in the phrase have a whack at )

  5. informal out of order; unbalanced

    the whole system is out of whack

"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

interjection

  1. an exclamation imitating the noise of a sharp resounding blow

"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
whack More Idioms  

    More idioms and phrases containing whack

    • have a crack (whack) at
    • out of kilter (whack)

Other Word Forms

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.

The bakery now has a long-term lease, as do other graduates of the program, including Mello flower shop, arts-and-crafts studio Craftivity and Whack Donuts.

From Los Angeles Times • Mar. 16, 2026

Whack it about for the first hour or bat for as long as they can?

From BBC • Feb. 23, 2024

“I sound great when I’m singing in the shower,” Whack declares on this single from her forthcoming album “World Wide Whack.”

From New York Times • Jan. 26, 2024

Whack is due back in court on April 1.

From Fox News • Mar. 29, 2022

My cousin's shout comes from the bench: "Whack it, Anna! And then run to Jenna. Martha, take it easy on her, will you?"

From "You Bring the Distant Near" by Mitali Perkins