(1):
(n.) A portion; share; allowance.
(2):
(v. t.) To divide into shares; as, to whack the spoils of a robbery; - often with up.
(3):
(n.) A smart resounding blow.
(4):
(v. t.) To strike; to beat; to give a heavy or resounding blow to; to thrash; to make with whacks.
(5):
(v. i.) To strike anything with a smart blow.