whack

v., whacked, whack·ing, whacks.

v.tr.

1. To strike (someone or something) with a sharp blow; slap.
2. Slang. To kill deliberately; murder.

v.intr.

To deal a sharp, resounding blow.

n.

1. A sharp, swift blow.
2. The sound made by a sharp, swift blow.

phrasal verb:

whack off Vulgar Slang.

1. To masturbate.

idioms:

have (or take) a whack at Informal.

1. To try out; attempt.

out of whack Informal.

1. Improperly ordered or balanced; not functioning correctly.

whacked out Slang.

1. Exhausted.
2. Crazy.
3. Under the influence of a mind-altering drug.

[Probably imitative.]

verb

1. To deliver a powerful blow to suddenly and sharply: bash, catch, clout, hit, knock, pop¹, slam, slog, slug³, smash, smite, sock, strike, swat, thwack, wham, whop. Informal biff, bop, clip¹, wallop. Slang belt, conk, paste. Idioms: let someone have it, sock it to someone. See attack/defend, strike/miss.
2. To hit with a quick, sharp blow of the hand: box², buffet, bust, cuff, punch, slap, smack¹, spank, swat. Informal clip¹, spat. See attack/defend, strike/miss.
3. To strike, set down, or close in such a way as to make a loud noise: bang, clap, crash, slam. See sounds/pleasant sounds/unpleasant sounds/neutral sounds or silence.

noun

1. A sudden sharp, powerful stroke: bang, blow², clout, crack, hit, lick, pound, slug³, sock, swat, thwack, welt, wham, whop. Informal bash, biff, bop, clip¹, wallop. Slang belt, conk, paste. See attack/defend, strike/miss.
2. A quick, sharp blow, especially with the hand: box², buffet, bust, chop¹, cuff, punch, slap, smack¹, smacker, spank, swat. Informal clip¹, spat. See attack/defend, strike/miss.
3. A brief trial: crack, go, stab, try. Informal fling, shot, whirl. See try.

In addition to the idioms beginning with whack, also see have a crack (whack) at; out of kilter (whack).

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According to arch-hacker James Gosling (designer of NeWS, GOSMACS and Java), to “...modify a program with no idea whatsoever how it works.” (See whacker.) It is actually possible to do this in nontrivial circumstances if the change is small and well-defined and you are very good at glarking things from context. As a trivial example, it is relatively easy to change all stderr writes to stdout writes in a piece of C filter code which remains otherwise mysterious.

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Dansk (Danish)
v. tr. - klaske, banke, uddele
v. intr. - afgøre et mellemværende
n. - slag, klask, bank, andel

Nederlands (Dutch)
klap, poging, meppen, delen

Français (French)
v. tr. - battre, frapper, (GB) piler (fam), (fig) réduire
v. intr. - porter un grand coup (à qn)
n. - grand coup, part, (GB) gros salaire, (payer) le maximum, essai, (avoir) la primeur

idioms:

• have a whack at    essayer de faire qch
• out of whack    mal rangé (placard), blessé (bras)
• whack off    se branler (vulg)

Deutsch (German)
v. - hauen, erschöpfen
n. - Schlag, (Slang) Versuch, (Slang) Anteil

idioms:

• have a whack at    etw. probieren
• out of whack    (Am.) aus dem Leim (ugs.)
• whack off    abschneiden, (Ugs.) wichsen

Ελληνική (Greek)
v. - βαρώ, κοπανάω, χαστουκίζω, δέρνω στα ψαχνά
n. - απόπειρα, δοκιμή, προσπάθεια, χτύπημα, (καθομ.) μερτικό, (δίκαιο) μερίδιο
int. - γκαπ!

Italiano (Italian)
picchiato, picchiare, botta

Português (Portuguese)
v. - golpear, derrotar
n. - pancada forte (f)
int. - bum!

Русский (Russian)
сильный удар, доля, попытка, хорошее состояние чего-л., бить, разбить, выделять долю, вгрызаться в работу

Español (Spanish)
v. tr. - golpear, aporrear, pegar, vapulear, derrotar (en un juego)
v. intr. - dar golpes, repartir golpazos
n. - golpe, porrazo, bofetada, palmada

idioms:

• have a whack at    dar una oportunidad
• out of whack    fuera de funcionamiento
• whack off    hacerse la paja

Svenska (Swedish)
v. - smälla till, dela
n. - smäll, andel
int. - bom

中文（简体）(Chinese (Simplified))
敲击, 瓜分, 重打, 重击, 尝试

中文（繁體）(Chinese (Traditional))
v. tr. - 敲擊, 瓜分, 重打
v. intr. - 重擊
n. - 重擊, 嘗試, 重打

한국어 (Korean)
v. tr. - (지팡이 따위로) 철썩 때리다, ~을 나누다, 쳐서 끊다
v. intr. - 철썩 치다
n. - 철썩 치기, 기도, 몫

日本語 (Japanese)
v. - 打ち負かす, 強打する, バシッと強くたたく
n. - 殴打, 安打

العربيه (Arabic)
‏(فعل) يضرب بشدة (الاسم) ضربه شديدة, دوي هذه الضربه, حصه, نصيب, فرصه, محاوله (نداء) تاخ تيخ, صوت الضربه !‏

עברית (Hebrew)
v. tr. - ‮היכה, הלקה, הצליף, חילק (עגה)‬
v. intr. - ‮היכה, הלקה, הצליף‬
n. - ‮הצלפה, קול חבטה, ניסיון, חלק‬

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whack a mole