youngspeak 

words that people 30 and over just don't understand.

Will you pick up some bread on the way home?
Oh for shizzle!
The older person has no idea what the youngspeak means unless they refer to the Urban Dictionary.

youngspeak by Phaedra December 26, 2005

youngsplaining 

When young people explain the impacts of aging to old people.

His youngsplaining included many details about how it takes longer and longer to recover from aches and pains as you get older. Then it was time for me to take my medications.

youngsplaining by whatisyourquest January 18, 2019

youngseok

n. a korean boy who gave up hope of getting a life.

Don't pull a youngseok!

youngseok by Youngsuck March 1, 2005