whack

American Heritage® Dictionary of the English Language, Fourth Edition

1. v. To strike (someone or something) with a sharp blow; slap.
2. v. Slang To kill deliberately; murder.
3. v. To deal a sharp, resounding blow.
4. n. A sharp, swift blow.
5. n. The sound made by a sharp, swift blow.
6. whack off Vulgar Slang To masturbate.
7. idiom. have Informal To try out; attempt.
8. idiom. out of whack Informal Improperly ordered or balanced; not functioning correctly.
9. idiom. whacked out Slang Exhausted.
10. idiom. whacked out Slang Crazy.
11. idiom. whacked out Slang Under the influence of a mind-altering drug.

Century Dictionary and Cyclopedia

1. n. Fettle; condition.
2. To give a heavy or resounding blow to; thwack.
3. To divide into shares; apportion; parcel out.
4. To strike, or continue striking, anything with smart blows.
5. To make a division or settlement; square accounts; pay: often in the phrase to whack up.
6. n. A heavy blow; a thwack.
7. n. A stroke; a trial or attempt: as, to take a whack at a job.
8. n. A piece; a share; a portion.
9. n. Appetite.

Wiktionary

1. n. A blow, impact or slap.
2. n. A share or portion.
3. n. An attempt.
4. v. To hit, slap or strike.
5. v. To kill, bump off.
6. v. To share or parcel out.

GNU Webster's 1913

1. v. colloq. To strike; to beat; to give a heavy or resounding blow to; to thrash; to make with whacks.
2. v. Slang To divide into shares; ; -- often with up.
3. v. To strike anything with a smart blow.
4. n. colloq. A smart resounding blow.
5. n. Slang A portion; share; allowance.
6. n. colloq. an attempt

WordNet 3.0

1. v. hit hard
2. n. the sound made by a sharp swift blow
3. n. the act of hitting vigorously