black out

black out (to pass out; to become unconscious; to stop being conscious) — отключиться, потерять сознание, jтрубиться, вырубиться

Example 1: I blacked out right after the accident. (CAI)

Example 2: After he hit me, I must have blacked out.

Example 3: I think I am going to black out.

Related vocabulary:
[blank out]
go blank
[out like a light]