young old 

A person who is generaly young (aged 27 to 37) that through many years of drinking and smoking, looks 15 to 25 years older.

Look at wendy, shes 32 and she looks 54! ewwwwwwwwwwwwwwwwwwwww is she young old

young old by brett calvin October 2, 2006

young old man 

Used to define a young person who is very mature in many ways

Michael is such a "young old man" he never sneaks out

young old man by Bigbadadonis May 8, 2018

young old boy 

old boy In Kempston, just as people say 'old man' as a term for their father, we also use 'old boy' to refer to our elder brothers. In the same way, 'young old boy' is used to refer to our younger brothers. This appears to be contained within Kempston and is dying out.

Half-brothers and step-borthers are also sometimes described in this way.

It is mostly only used in the genetic sense but is seldom used in terms of emotional bonds.

Excerpt
Person A: Aren't you somebody's little brother?
(person's B's response here)
Kempstonian person: Yeh, they're my young old boy.

young old boy by Walking Talking Dictionary August 10, 2006

it hasn't any old or young in ruins 

To not respect your elders

My grandson called me fatty the other day, nowadays it hasn't any old or young in ruins

it hasn't any old or young in ruins by sphagett April 26, 2022

Young guns and old timers 

When you need an excuse to have both younger generations of talent but also keep some old guys around the shop for experience even though they don’t know shit cause they are old and forgot

Their staff is full of young guns and old timers

Young guns and old timers by tracknation66 August 13, 2025

Old but young lady 

People who’s names start with a d, go to bed really early, too young to drink, like country music, like old movies like the Titanic, and they bully people

this one weird person I know who’s name starts with a D is a old but young lady

Old but young lady by ushdhehshd May 22, 2022

Youngoldie 

A term used when two people are close in age , but not young nor old when the ages are compared. It is a term used to describe an age that's in the middle. :D

Gabbie "Haha, alright youngin'!"
Algee "Well...you're an oldie, if I'm a youngin'!"
Gabbie "No, we're both just YOUNGOLDIES!"
Algee "Coool :)"

Youngoldie by gchristiex April 5, 2010