Falshback 

When something sparks a drunken memory, but the person telling the story tells it wrong and has to be corrected by someone sober enough to remember.

Brah 1: I got a ride home from one of the bartenders. She was hot.

Brah 2: Nope, you’re having another falshback. You drove yourself home, slid into the mailbox, and slept with some nasty older lady.

Falshback by iBetty December 27, 2012

Vietnam Flashback 

When you remember a (usually) traumatic experience and disconnect all outside distractions.

Ariana: I think Mikey is high..
Justin: Nah, she is having a Vietnam Flashback from when she was on Hannah Montana.
Selena: I get it. Disney is awful.
Ariana: Yeah, Nickelodeon is better.

Vietnam Flashback by TheDonutLordOfVietnam September 5, 2016

war flashbacks 

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!

war flashbacks by flipflopdrop July 29, 2013

Sandusky Flashback

A painful memory of a childhood raping.

Mr McKenna had a Sandusky Flashback as he watched the local high school football game.

Sandusky Flashback by DPgumby May 1, 2012

flashback humour 

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?

flashback humour by Fearman December 23, 2007

flashback mary 

too much powder. also a glorious twitter meme.

hi sisters! today we are gonna skip powder in our makeup tutorial because well...flashback mary.

flashback mary by cloutcoins May 15, 2018

Flashbackgasm

when a person thinks back on a great sexual experience and gets tingles down their spine or the feeling of a small orgasm

Girl 1: You alright?
Girl 2: umm yes, just had a flashbackgasm my man did me right last night

Flashbackgasm by Ms.TrippleDNOTbatteries April 21, 2012