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to crack up

to crack up

18 3.5
To laugh loudly and without control
  • phrasal verb
  • /kræk ʌp/
  • Informal
translation icon : partirse de risa
  • My wife and I were cracking up about this because five years ago, we would never watch a movie with subtitles.
  • crack up laughing
  • crack up with laughter
  • start cracking up

She has a car, she told me, and we both cracked up, the thought of it wild.

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Examples

  • Oh, Marie-- she really cracks me up.

  • This is the sort of thing that cracks my family up.

  • But it was fun just watching the man crack up in the middle of the story.

    Blog text (34)
  • I was cracking up at everything.

  • This guy cracks me up.

  • Well, that was enough to get the whole audience cracking up at his reaction!

    Blog text (7)
  • Please do, so I can really start cracking up at what a clown you are.

    Blog text (7)
  • I can't even look at his face without cracking up; he is a brilliant comedian.

    Blog text (24)
  • You crack me up.

  • When he told the joke, everyone started to crack up laughing uncontrollably.

Synonyms

to cackle
vsto crack up
18 6.0

To make a loud high sound like a hen or laugh in a loud harsh way

is loud and uncontrolled but usually less shrill and harsher
to break up
vsto crack up
  • Informal
9 3.0

Start laughing very hard and cannot stop

is similar but focuses on loudness rather than sudden start
to burst out laughing
vsto crack up
  • Informal
8 2.4

To suddenly start laughing loudly and not be able to stop

is similar but describes general loud uncontrolled reaction rather than sudden onset
to laugh my head off
vsto crack up
  • Informal
3 5.1

To make loud, long sounds because something is very funny

is the same uncontrolled loudness but not necessarily long lasting
to laugh one's head off
vsto crack up
  • Informal
1 3.5

To make loud sounds you cannot stop because something is very funny

is similar but may not imply extreme duration
to rolf
vsto crack up
  • Slang
1 9.7

To laugh very hard at something funny online

is broader and applies to any very loud uncontrollable reaction
to split one's sides
vsto crack up
  • Informal
1 5.6

To laugh very hard

is similar but expressed without the bodily exaggeration
to giggle uncontrollably
vsto crack up
1 4.0

To laugh in a way you cannot stop because you find something very funny or feel embarrassed

is louder and more forceful rather than light and silly
to roll about in laughter
vsto crack up
  • Informal
3.3

Feel so amused that you fall over and move on the floor

is similar but does not require physical movement while laughing
4.5

Laugh so hard that your body shakes

is loud and uncontrolled but less focused on body shaking
to gag with laughter
vsto crack up
  • Informal
6.5

To laugh so hard you almost choke

is loud and uncontrollable but not necessarily physically overwhelming
to cachinnate
vsto crack up
  • Archaic
9.9

To laugh loudly and without control

is similar but carries a more common, less old-fashioned tone

Antonyms

To stop yourself from making a sound when something is funny

How Loud

to crack up
  • Informal
18 3.5
to laugh
1.0
to chuckle
237 2.0

Surface Forms

crack up infinitive
cracking up present participle
cracks up third person singular
cracked up past
cracked up past participle

Morphology

crack + up

The meaning 'to suffer a mental or emotional breakdown' is directly built from 'crack' (to give way emotionally) with the particle 'up' providing a predictable resultative/completive nuance. This verb+particle pattern is common and the core meaning is present in the verb, so a B1 learner who knows both constituents would readily infer the MWE meaning.

Etymology

Crack up comes from the image of a person laughing so hard they seem to crack or burst with sound. The verb crack means 'to break' and with up it shows a sudden move into laughter, so the phrase means 'to laugh loudly'.