smack

smack — verb

1. to strike a person or animal with one's open palm, most often done to discipline

1.verbtransitiveB1
Definition

to strike a person or animal with one's open palm, most often done to discipline a child for misbehaviour

Example

Soraya smacked her son's hand when he reached for the hot stove.

smack + body part for discipline

Grandpa never smacked any of his grandchildren, no matter how badly they behaved.

Common collocations
  • smack someone's hand
  • smack a child
  • smack a bottom
  • smack a dog
Synonyms
  • slap

    usually implies hitting the face with an open hand, more aggressive than 'smack'

  • spank

    specifically hitting the bottom as a punishment, usually of a child

  • swat

    a quick, light hit, often to kill an insect or to get someone's attention

Antonyms
  • caress

    to touch gently and lovingly, opposite of hitting

Grammar Patterns

smack + noun phrase (person/animal)

Usage Note

Object is typically a child, a hand, or an animal. This sense is less common in formal or legal writing, where 'strike' or 'hit' is preferred.

Common Mistakes

She smacked the vase off the table.
She knocked the vase off the table.
'smack' as a verb for hitting a person with your hand; for objects hitting surfaces, use the second sense.

2. to forcefully push or drop something onto a surface, producing a sharp sound on

2.verbtransitiveB1
Definition

to forcefully push or drop something onto a surface, producing a sharp sound on impact; also, for an object to strike a surface noisily

Example

Hugo smacked the book down on the desk in frustration.

smack + object + down on + surface

A big wave smacked the side of the boat, soaking everyone on deck.

Common collocations
  • smack against the wall
  • smack into the door
  • smack down
  • smack the ball
Synonyms
  • bang

    similar in sound and force, often used for doors ('bang the door shut')

  • slam

    to shut or hit with great force, often implying anger

Grammar Patterns

smack + object + against/into/on + surface

Usage Note

This sense typically pairs with a preposition such as 'against', 'into', 'on', or 'down'. The subject can be a person, an object, or a natural force like a wave.

Common Mistakes

She smacked her knee.' (without saying where)
She smacked her knee against the table leg.
this sense requires a target surface for clarity.

3. to have a noticeable taste, quality, or suggestion of something, especially some

3.verbintransitiveB2
Definition

to have a noticeable taste, quality, or suggestion of something, especially something that seems bad, dishonest, or unpleasant

Example

The soup smacked of garlic and old herbs that did not belong together.

smack of + food flavour

To many voters, the mayor's apology smacked of dishonesty and political calculation.

smack of + abstract quality (dishonesty)

Common collocations
  • smack of dishonesty
  • smack of garlic
  • smack of corruption
  • smack of desperation
Synonyms
  • suggest

    neutral in tone, not limited to negative contexts

  • hint at

    weaker than 'smack of', implies a slight suggestion

  • reek of

    stronger and more negative, often about smells or bad qualities

Grammar Patterns

smack of + [abstract noun / concrete noun]

Usage Note

Almost always followed by 'of'. Common in negative contexts about unpleasantly suggestive qualities. Less commonly used for neutral or positive tastes.

Common Mistakes

The food smacks garlic.
The food smacks of garlic.
'smack of' requires the preposition 'of'.

4. to press your lips together and then pull them apart quickly to make a short sou

4.verbtransitive / intransitiveB1
Definition

to press your lips together and then pull them apart quickly to make a short sound, often because food tastes good or you are eager to eat something; also, to kiss someone with a short loud sound

Example

Christopher smacked his lips loudly after tasting the chocolate cake.

smack one's lips — enjoying food

Sayaka's grandpa always smacked his lips before starting a meal.

Common collocations
  • smack one's lips
  • smack someone on the cheek
  • smack a kiss
Synonyms
  • kiss

    neutral register; 'smack' adds the idea of a noisy or theatrical kiss

  • peck

    a quick, light kiss without the loud sound

Grammar Patterns

smack one's lips

smack + person + on + body part

Usage Note

'Smack one's lips' is a fixed expression usually indicating enjoyment of food or eager anticipation. The kissing sense is playful or old-fashioned in tone.

Common Mistakes

He was smacking his mouth.
He was smacking his lips.
the fixed expression uses 'lips', not 'mouth'.
Phrasal verbs

smack of

phrasal verb

To seem to have a particular quality, especially a bad one.

His excuse smacks of dishonesty and laziness.

The new policy smacks of unfairness to small businesses.

smack up

phrasal verb

To hit someone or something hard, causing damage or injury.

The angry man threatened to smack up the car.

Did the bully really smack up that kid after school?

Idioms

To make a loud sound with your lips to show you are enjoying food or something you are about to eat.

Maya smacked her lips after tasting the chocolate cake.

Why are you smacking your lips? Is the soup that good?

smack — noun

smack — adverb

Word family

  • smacker
    nounC1
  • smacking
    nounB2
  • smacking
    adjectiveC1
  • smackhead
    nounC2

Synonym discussion

Sense: verb/1

'Smack', 'slap', 'spank', and 'swat' all describe hitting with an open hand, but differ in target, force, and purpose. 'Smack' is the most general term — it can be a disciplinary hit on a child's bottom or hand, or simply a sharp strike to any surface. 'Slap' usually targets the face and implies anger or insult: slapping someone's face is an aggressive act. 'Spank' is specifically hitting the buttocks as a punishment, usually of a child, and often involves repeated blows. 'Swat' is quick and light — you swat a mosquito on your arm, or a parent might swat a toddler's hand away from danger. In practice: 'The mother smacked her son's hand for touching the stove' (discipline); 'He slapped the man across the face' (aggression); 'The father spanked the child for lying' (punishment on the bottom); 'She swatted the fly with a newspaper' (quick hit).

Common collocations

Phrases

  • smack in the middle
  • smack of
  • smack bang
  • with a smack

Prepositions

Etymology

Dutch/Low GermanEnglish

'Smack' comes from the Dutch or Low German word 'smakken', meaning to strike or throw down noisily. It entered English in the 1500s, first as a verb for hitting with a loud sound. By the 1600s it was also used for the sound of lips parting. The slang meaning 'heroin' appeared in the 1940s and may be connected to the idea of a 'smack' (a small amount) or a Russian word 'smak' meaning 'taste'.