1. When something happens that reminds you of an embarrassing, difficult, or so-disturbing-that-you'll-never-be-able-to-unsee-it event in your life.

2. Actual flashbacks to actual battles. Can happen with PTSD.
Oh my god, that was the same position my parents used when I walked in on them as a kid. I'm having war flashbacks!

Don't you trigger a war flashback, son. I once killed a man!
by flipflopdrop July 3, 2013
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Indirect breach of the fourth wall at the end of the movie "Fight Club". When the plot comes around to the opening scene again after two hours of flashback, the Narrator (Edward Norton) states he "still hasn't anything to say", and Tyler Durden (Brad Pitt) refers to this as "flashback humour".
Any other definitions for flashback humour?
by Fearman November 21, 2007
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too much powder. also a glorious twitter meme.
hi sisters! today we are gonna skip powder in our makeup tutorial because well...flashback mary.
by cloutcoins March 23, 2018
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the spirit of those who falsely apply their powder. never summon after midnight. ro summon, spin in a circle three times saying flashback mary.
"flashback mary, flashback mary, flashback mary...HI SISTERS"
by sister safe November 12, 2018
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Similar to Throwback Thursdays, this is sharing a past post or image on social media sites
A typical social media update:
'It's Flashback Friday. Remember this picture of us?'
#flashbackfriday
by Parrotscantflylikesuperman November 15, 2013
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A play on words referring to (Viet)nam flashbacks.

When a person remembers a time that they were uncomfortably full, or consumed a large amount of food, usually around Thanksgiving or the holiday season.
Holy cow, I just had a nom flashback of last Thanksgiving.

That turkey just gave me a nom flashback.
by Reuben Steuben February 17, 2011
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