fall apart

verbs

lose one's emotional or mental composure
"She fell apart when her only child died"
fall apart, go to pieces
go to pieces
"The lawn mower finally broke"; "The gears wore out"; "The old chair finally fell apart completely"
break, bust, fall apart, wear, wear out
break or fall apart into fragments
"The cookies crumbled"; "The Sphinx is crumbling"
crumble, fall apart
become separated into pieces or fragments
"The figurine broke"; "The freshly baked loaf fell apart"
break, come apart, fall apart, separate, split up