crack up
To laugh.
It was hilarious. We were cracking up the whole time.
ADJ
big, deep, huge, large, long, serious | short, small | fine, hairline, thin
CRACK + VERB
appear | develop, spread
run
A long crack ran across the ceiling after the earthquake shook our apartment.
ADJ
narrow, small, tiny | wide
VERB + CRACK
fill
The builders used cement to fill several cracks that had appeared in the concrete foundation.
CRACK + VERB
appear
Small cracks appeared in the old ceiling after the heavy rain last week.
open up, widen
PREP
~ in
The old vase developed a long crack in its side after it fell on the kitchen floor.
PHRASES
a crack of light
She noticed a crack of light coming through the wooden shutters as dawn broke.
open a door/window a crack
She opened the door a crack to peek into the dark hallway.
ADJ
loud, sharp
VERB + CRACK
give, let out
When she heard the joke, she let out a crack of laughter that made everyone turn around.
hear
PREP
with a ~
The old wooden door burst open with a crack that echoed through the empty house.
~ of
PHRASES
the crack of a whip, a crack of thunder
ADV
badly
The windshield cracked badly when a rock hit it on the highway.
slightly
ADV
completely
finally
After weeks of studying for the exam, he finally cracked and decided to take a break.
up
After months of stress at work, she finally cracked up and took a week off to recover.
PHRASES
crack under the pressure/strain, show signs of cracking
After months of difficult negotiations, the manager finally cracked under the strain.
PHRASAL VERBS crack down
ADV
hard
PREP
on
The government announced new measures to crack down on illegal dumping in the city.