Donkey's Years 

Used to describe a very long passing of time.

I haven't seen Melvin in Donkey's Years! Not even sure I'd recognize him if he walked up to me.

Donkey's Years by talk2me-JCH2 July 6, 2022

donkey's years 

A really long time.

1. oh, I've known her for donkey's years.

2. I've worked her donkey's years and I still don't know how to use the photocopier.

donkey's years by possum_sue April 20, 2008

Donkey's years 

Several decades.

World war Two was donkey's years ago.

Donkey's years by Kung-Fu Jesus May 2, 2004

Donkey's Years 

Sometimes referred to as Donkey Years or Donkey's Ears. It means a really really long time.

"I haven't seen Johnny in Donkey's Years"

"Wow it's been Donkey Years since the last time I ate pop tarts!"

Donkey's Years by AnnaOhhhh September 14, 2009