Antonio C1.2 had this word in his Spring story.
To blackout – can be a verb, yes! https://educalingo.com/es/dic-en/blackout#conjugacion
But because to say “I blackouted” is kind of awkward, we can also say “I had a black out”
Have you ever had a blackout?
Michelle Ford's C1 Course Blog (2019-20 barely used) 
After I fell, I suffered a blackout. 😉
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👐🏾🤸🏽♀️😍😚
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