ex-phemera 

ex·phem·er·a

noun

Things that you learned because of or for an ex-partner usually relating to their own interests and hobbies that you never or no longer care about. Based on the word ephemera which means things that exist or are used or enjoyed for only a short time.

Q: Why do you know so much about jetskiing?
A: It's just ex-phemera, I don't actually give a shit about jetskiing.

ex-phemera by Adri33 January 2, 2018

ephemeral 

1- Lasting for a markedly brief time: “There remain some truths too ephemeral to be captured in the cold pages of a court transcript” (Irving R. Kaufman).
2- Living or lasting only for a day, as certain plants or insects do.

"the ephemeral joys of childhood"; "a passing fancy"; "youth's transient beauty"; "love is transitory but at is eternal"; "fugacious blossoms"

ephemeral by phatmatt27 September 7, 2005

Ephemeral 

Lasting for a short period of time; typically one day.
Or
A short-lived experience.

The feeling was ephemeral.
The spring is ephemeral.
You have an ephemeral experience in life.

Ephemeral by ♥!Me!♥ April 6, 2015

ephemeralia 

Assorted objects that people tend to accumulate, like receipts and ticket stubs and tissues.

There was ephemeralia scattered all over the floor of her room.

ephemeralia by janine doe November 30, 2013

Ephemerabilia

Objects like groan tubes, bouncy balls and light-up wands you buy in novelty shops that seem great at the time but later you realise is just worthless shite.

Fred:...Why did I buy this Glowing Mickey Ears light up wand in Disneyworld again?
Lucas: Dude, I told you when you in the shop, that's totally just ephemerabilia.

Ephemerabilia by Rebsicle July 24, 2015

ephemera 

How some psycho girls think of boys: used only for a short time.

"Hi. I'm Caroline. I like that boy. I'll add him to my list of ephemeras."

ephemera by Andy MON September 7, 2007

ephemerable 

Having the quality of fleetingness; having the likelihood or ability to become ephemeral

Kindle books are speculated to be ephemerable after their mysterious disappearance from users' devices.

ephemerable by yourfatherandfriends May 28, 2013