crack up
/kræk ʌp/
noun
- A mental breakdown or loss of emotional control.
- His friends worried that the stress would lead to a crack-up.
- The soldier's crack-up was caused by the horrors he had seen in battle.
- After working nonstop for months, she had a crack-up and needed rest.
- A crash or collision, especially of a vehicle.
- He survived the crack-up with only minor injuries.
- The car was totaled in the crack-up on the icy road.
- The crack-up on the highway caused a huge traffic jam.