1. mental or emotional breakdowns
Usage: informal
2. vehicle crashes or collisions
Usage: informal
3. instances of uncontrollable laughter
Usage: informal

Examples

• The stress of finals caused several students to have crackups.
• There were three serious crackups on the highway during the storm.
• Her jokes always cause crackups in the classroom.
• The comedian’s performance led to crackups throughout the audience.
• After working 80-hour weeks, he was on the verge of a crackup.
• The icy roads resulted in multiple crackups that morning.