verb
whacks; whacked; whacking
informal :to hit (someone or something) with great force [+ obj]
[+ obj] US informal :to reduce (something) by a large amount :slash
[+ obj] US slang :to murder or kill (someone)
noun
plural whacks
informal
[count] the act of hitting someone or something with great force
the sound made when something is hit hard
[noncount] Brit :a share or portion of something
(all) in one whack
US informal :at one time :in a single amount
have/take a whack at
US informal :to try to do (something)
out of whack
US informal :not working properly :not in good condition