ˈ ̷ ̷ˌ ̷ ̷ noun
( -s )
Etymology: from crack up, v.
: an instance of cracking up: as
a. : nervous breakdown
b. : a wrecking or smashing especially of a vehicle ; specifically : an accident involving serious but repairable structural damage to an aircraft
c. : collapse , breakdown
the crack-up of a political coalition