Hypertext Webster Gateway: "whacked"
From Webster's Revised Unabridged Dictionary (1913) (web1913)
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.
From WordNet (r) 1.7 (wn)
whacked
adj : (British informal) exhausted or worn out
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