you can't teach an old dog new tricks 

It means that it is very hard to change someones habits

You can't teach an old dog new tricks when they have been used to using a cell phone instead of a smart phone.

you can't teach an old dog new tricks by Zahraa June 13, 2017

Cartoon Network New - Old 

Cartoon Network was my childhood. I cant say how many days I woke up on a Sunday to catch the episode of Dexters Lab or Ed Edd n Eddy. Cartoon Cartoon was also taken off and when Toonami was taken off I almost shit my pants. If Fallout 3 Was a T.V channel it would be this. Now we have shit like Fish Hooks and Adventure Time which is bullshit!. People don't know what a cartoon is anymore...

Person: Hey! Want to go watch The Misadventures of Flapjack on Cartoon Network New - Old?

Me: Go fuck yourself.

Cartoon Network New - Old by UnhappyWalrus March 6, 2011

Old dog new trick 

Saying you can or can't teach something to someone once they've gotten past the time when they learned their ideals/ways. Saying you can or can't change someones mind about their long term opinions or beliefs. can be referring to a human as well.

A: my dog won't listen when I tell him to sit!
B: yeah, you can't teach an old dog new tricks.

A: but can't you just hear me out on this, B?
B: no! I made up my mind a long time ago.
A: *sigh* you can't teach an old dog new tricks.

A: I'm 70 years old but I just learned rock climbing!
B: you can teach an old dog new tricks!

Old dog new trick by Rileyisafk December 18, 2022

You Can't Teach An Old Frog New Tricks

The full title of one of the most annoying Chips Challenge levels ever, featured in CCLP3.

Crap, You Can't Teach An Old Frog New Tricks is so damn hard!

You Can't Teach An Old Frog New Tricks by mypseudoonym... February 6, 2012

new old

Ghetto, pertaining to the ghetto

I can't tell if that guy has a limp, or if he's just new old.

new old by Tom Cook March 24, 2004

teach an old dog new tricks 

when someone does something for a long time and its hard to teach them new abilities.

you cant teach an old dog new tricks, my uncle never learned how to use his cellphone.

teach an old dog new tricks by Andre the CRACKER DACKER November 18, 2016

New Shoes Old Laces 

The act of giving oral pleasure in a vehicle while trying to look you are tying your shoes.

It looks like Jeremy's girlfriend has a case of the "New Shoes Old Laces".

New Shoes Old Laces by Totsally April 27, 2015