BREAKDOWN
NOUNS
..20C ► CRACK-UP a mental breakdown → colloq.
1972 ► MENTAL HERNIA a mental breakdown → Amer. jocular usage
VERBS
.M19 ► COME OFF THE RAILS to suffer an emotional breakdown → sl.
1850 ► CRACK UP to break down whether physically or mentally → colloq.
1917 ► CRACK to suffer an emotional breakdown; to become insane → Amer. sl.
1931 ► PSYCH OUT to break down; to lose control psychologically → colloq.
Lexicophilia 