to strike with a smart, resounding blow or blows.

Slang . to divide into or take in shares (often fol. by up )

Whack the loot between us two.

to strike a smart, resounding blow or blows.

a smart, resounding blow

a whack with his hand.

Informal . a trial or attempt

to take a whack at a job.

Slang . a portion or share. ?

whack off,

to cut off or separate with a blow

The cook whacked off the fish's head.

Slang

Vulgar to masturbate.

whack out, Slang . to produce quickly or, sometimes, carelessly

She whacks out a short story every week or so.

out of whack

Informal . out of order or alignment; not in proper condition.

noun

bang , bash , bat , beat , belt , biff , box , buffet , clobber , clout , crack , cuff , ding * , lambaste * , nail , rap , slap , slug , smack , smash , sock , strike , thrash , thump , thwack * , wallop , wham * , fling , go , pop , shot , stab , turn , whirl , hit , lick , pound , swat , thwack , welt , wham , whop , bust , chop , punch , smacker , spank

verb

bash , catch , clout , knock , pop , slam , slog , slug , smash , smite , sock , strike , swat , thwack , wham , whop , box , buffet , bust , cuff , punch , smack , spank , clap , crash