- OLDDOG
- One with ingrained habits
- Seasoned veteran
- Hard one to teach, proverbially
- Type who can't be taught
- One with difficulty learning new tricks, supposedly
- Not a prospect for learning new tricks
- Proverbial fogy
- Proverbial learning-disabled one
- It's hard to teach one new tricks, so they say
- Pooch beyond trick-learning years, supposedly
- New tricks non-learner
- Unteachable one, it's said
- Set-in-ways one, supposedly
- Proverbial nonlearner
- New trick resister, supposedly
- Tray, for one.
- Stephen Foster's "___ Tray"
- Nonlearner, proverbially
- One who can't learn new tricks, they say
- Hard one to teach, in a saying
- Unteachable sort, in a saying
- One can't learn new tricks, it's said
- Resister of new tricks
- One resistant to new tricks
- Poor learner, according to a proverb
- Geezer
