from The American Heritage® Dictionary of the English Language, 4th Edition
- transitive v. To strike (someone or something) with a sharp blow; slap.
- transitive v. Slang To kill deliberately; murder.
- intransitive v. To deal a sharp, resounding blow.
- n. A sharp, swift blow.
- n. The sound made by a sharp, swift blow.
- whack off Vulgar Slang To masturbate.
- idiom have Informal To try out; attempt.
- idiom out of whack Informal Improperly ordered or balanced; not functioning correctly.
- idiom whacked out Slang Exhausted.
- idiom whacked out Slang Crazy.
- idiom whacked out Slang Under the influence of a mind-altering drug.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. A blow, impact or slap.
- n. A share or portion.
- n. An attempt.
- v. To hit, slap or strike.
- v. To kill, bump off.
- v. To share or parcel out.
from the GNU version of the Collaborative International Dictionary of English
- transitive v. To strike; to beat; to give a heavy or resounding blow to; to thrash; to make with whacks.
- transitive v. To divide into shares; ; -- often with up.
- intransitive v. To strike anything with a smart blow.
- n. A smart resounding blow.
- n. A portion; share; allowance.
- n. an attempt
from The Century Dictionary and Cyclopedia
- n. Fettle; condition.
- To give a heavy or resounding blow to; thwack.
- To divide into shares; apportion; parcel out.
- To strike, or continue striking, anything with smart blows.
- To make a division or settlement; square accounts; pay: often in the phrase to whack up.
- n. A heavy blow; a thwack.
- n. A stroke; a trial or attempt: as, to take a whack at a job.
- n. A piece; a share; a portion.
- n. Appetite.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- v. hit hard
- n. the sound made by a sharp swift blow
- n. the act of hitting vigorously
Probably imitative.(American Heritage® Dictionary of the English Language, Fourth Edition)