Whack \Whack\, v. t. [imp. & p. p. Whacked; p. pr. & vb. n. Whacking.]

[Cf. Thwack.]

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.

Source: Webster's Revised Unabridged Dictionary (1913)
 

Whack \Whack\, v. i. To strike anything with a smart blow.

To whack away, to continue striking heavy blows; as, to whack away at a log. [Colloq.]

Source: Webster's Revised Unabridged Dictionary (1913)
 

Whack \Whack\, n. A smart resounding blow. [Colloq.]

Source: Webster's Revised Unabridged Dictionary (1913)
 

Whack \Whack\, v. t. To divide into shares; as, to whack the spoils of a robbery; -- often with up. [Slang]

Source: Webster's Revised Unabridged Dictionary (1913)
 

Whack \Whack\, n. A portion; share; allowance. [Slang]

Out of whack, out of order. [Slang]

Source: Webster's Revised Unabridged Dictionary (1913)