flake out

Verb

flake out (third-person singular simple present flakes out, present participle flaking out, simple past and past participle flaked out)

1. (informal, intransitive) To fall asleep from exhaustion or intoxication; to lie down.
2. (informal, intransitive) To flake or be flaky: to prove unreliable; to abandon or desert someone.
   • John said he could drive me to the airport, but then he flaked out on me, and I had to call a cab at the last minute.
3. (intransitive, slang) To crack up or break down; to have a mental episode; to behave eccentrically.