noun
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, somewhat 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.
(dated, disco-era drug slang) PCP, phencyclidine (as also wack).
(slang, computing, typography) The backslash, ⟨ \ ⟩.
(slang) Alternative spelling of wack (“annoyingly or disappointingly bad”)
verb
To hit, slap or strike.
(slang) To assassinate, bump off.
(transitive, slang) To share or parcel out (often with up).
(sports) To beat convincingly; to thrash.
(UK, chiefly in the negative) To surpass; to better.
(Singapore, Singlish) To attempt something despite not knowing how to do it; to take on a task spontaneously and carelessly without planning.
(Singapore, Singlish) To eat something hurriedly.
adjective
Alternative spelling of wack (“annoyingly or disappointingly bad”).