Snapmesia 

Amnesia caused by Snapchat's no-saving-texts feature.

(Two friends are texting on Snapchat)
Friend 1: Those guys were terrible
Friend 2: I know they sucked really bad
Friend 1: BRB my mum's calling me
Friend 2: Ok

(Both friends swipe left and exit the chat)
(Ten minutes later)

Friend 1: I'm back
Friend 2: What were we talking about?
Friend 1: I have no idea
Friend 2: Snapmesia?
Friend 1: Yup

Snapmesia by IboliviaNow June 18, 2016

snapnesia 

The confusion or amnesia that occurs from excessive use of Snapchat, wherein one forgets what was sent to whom or what was sent at all

(Snapchat received)
"That was gross :("
(Snapchat sent)
"What did I send? I have Snapnesia"
(Snapchat received)
"It was your hairy armpit, that's it"

snapnesia by daaaaaaaaaaave0 January 2, 2014

slapnesia 

sudden memory loss when threatened with prosecution for abuse.

Chris Brown suffered a debilitating case of slapnesia when he had to appear on Larry King Live about his "incident" with Rihanna.

slapnesia by gmcommgrad September 26, 2009

Snapnesia 

When you or your friend can't remember what was said in a previous snap.

Person: "I have a serious case of Snapnesia because I can't remember what you said in that last snap."

Snapnesia by j33zyjay September 21, 2016

Snapnesia 

The amnesia that occurs when someone responds to your Snapchat, and you have no recollection of what you sent.

Friend1 sends Friend2 a snap.
30 seconds later Friend2 replies "Looks good".
Friend1 cannot remember what they sent and responds "I forgot what I sent".
Friend2 reminds Friend1 what the snap was about.
Friend1 sends to Friend2 "That was a serious case of snapnesia."

Snapnesia by Sh4von October 13, 2018

Snapnesia 

Snapchat amnesia; 1) when a person sends a snap that illicits a response from someone and upon opening the response, the initial responder forgets what they sent. 2) looking through some else's snaps and immediately forgetting what you saw.

"Dude what are you responding to? I have snapnesia"
"Fuck, I didn't pay attention to your story. I had snapnesia"

Snapnesia by Kels000 April 14, 2017

Snapnesia 

That thing when someone responds to your snapchat and you already forgot what you said

He just responded with "why" but I just got total snapnesia... I have no idea what I sent him before that.

Snapnesia by grlax October 20, 2017