WHACK
knock, belt, rap, whack, whang
(noun) the act of hitting vigorously; “he gave the table a whack”
whack
(noun) the sound made by a sharp swift blow
whack, wham, whop, wallop
(verb) hit hard; “The teacher whacked the boy”
Source: WordNet® 3.1
Etymology
Noun
whack (plural whacks)
The sound of a heavy strike.
The strike itself.
The stroke itself, regardless of its successful impact.
(US, slang) An attempt, a chance, a turn, a go, originally an attempt to beat someone or something.
(originally UK cant, dated) A share, a portion, especially a full share or large portion.
(obsolete) A whack-up: a division of an amount into separate whacks, a divvying up.
(US, obsolete) A deal, an agreement.
(typography, computing, slang) The backslash, ⟨ \ ⟩.
Verb
whack (third-person singular simple present whacks, present participle whacking, simple past and past participle whacked)
To hit, slap or strike.
• G. W. Cable
(slang) To kill, bump off.
(transitive, slang) To share or parcel out; often with up.
(sports) To beat convincingly; to thrash.
(UK, usually in the negative) To surpass; to better.
Synonyms
• See also kill
Adjective
whack (comparative whacker, superlative whackest)
Alternative form of wack (“crazy”)
Source: Wiktionary
Whack, v. t. [imp. & p. p. Whacked; p. pr. & vb. n. Whacking.] Etym:
[Cf. Thwack.]
Definition: To strike; to beat; to give a heavy or resounding blow to; to
thrash; to make with whacks. [Colloq.]
Rodsmen were whackingtheir way through willow brakes. G. W. Cable.
Whack, v. i.
Definition: To strike anything with a smart blow. To whack away, to
continue striking heavy blows; as, to whack away at a log. [Colloq.]
Whack, n.
Definition: A smart resounding blow. [Colloq.]
Source: Webster’s Unabridged Dictionary 1913 Edition