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

Ephebiphobia 

The fear of teenagers

Ephebiphobia: "And they say teenagers scare the living shit out of me." Gerard Way, MCR

Ephebiphobia by @GerardWay January 23, 2018

ephebiphobia 

The fear and loathing of teenagers.

Man, that old dude has a severe case of ephebiphobia! He's always yelling at us and kicking us out of his store for no good reason.

ephebiphobia by teenlibrarian May 9, 2005

Ephebophilia 

Sexual attraction, preferentially, to teenagers who have been through puberty. It does not mean preference for adults, as some have thought. The age range is generally considered to be 15-19. It should be noted that almost all adults profess attraction to this age group, and that one is classified as an ephebophile only if this age group is chosen preferentially.

The beloved may or may not have reached the age of consent, depending on local laws.

Watch out, man! People will call you a pedo!

I'm no pedo! I like them grown up, just young. I'm have ephebophilia.

(From the Greek "epi-", upon + "Hebe", the goddess of youth, signifying those who have completed puberty + "-philia", loving.)

Ephebophilia by Dubiaku December 16, 2012

Ephebophilia 

A sexual attraction to a teenaged girl or boy who is not at the legal age of consent. Differs from Pedophilia in that said girl or boy has already reached and/or gone through puberty.

"Those who like lolicon are probably into ephebophilia, not pedophilia."

Ephebophilia by Kym March 2, 2005

ephebiphobia 

The hatred of teenagers.
A condition that seems to affect the majority of Urban Dictionary.

Go look up the definition of teenager. That's some SERIOUS ephebiphobia right there!

ephebiphobia by spel itt rite June 29, 2006

Ephebophilia 

A sexual attraction towards young men or women who are in the later stages of adolescent maturity and early adulthood.

A love for physical nubile form.

The state of an inate sexual arousal (or urge) in homosapiens sapiens to pass along their genetic information, and with optimal proficiency, to produce the healthiest offspring that can repeat the process of evolutionary life cycles as guided by natural selection.

Scientific studies have concluded that women, generally between the ages of 16 and 23, are at the apex of their fertility and fecundity and produce the healthiest descendants.

It's been purported, and various studies have shown, that at least 80% of adult males are ephebophiles, whether they acknowledge it or not.

"Ephebophilia is a common traight amongst adult men."

Ephebophilia by A.Sveltina February 2, 2021