Nambacks 

Vietnam Flashbacks, or just a flashback of an experience you'd rather forget

Dude 1: So I went to this concert, right? And this girl was all like "...

Dude 2: *is reminded of a bad , life before this-life after this experience he had at a concert long ago*

Dude 1: .....Yo, you still with me?

Dude 2: Oh shit, sorry, mate. I was having one of those nambacks. Please, carry on.

Dude 1: ooookay, as I was saying....

Nambacks by T_dawng May 16, 2018

Nambacks 

Defined as flashbacks to Vietnam

used instead of the word flashbacks

FRIEND 1: Do you remember when we used to watch Poppy the haunted tiger on TV?
FRIEND 2: Bro, don't even bring that up, your giving me nambacks.

Nambacks by poop237 October 4, 2023