My granny is as fit as a horse

[alpacinou]

Is "as fit as a horse" a common expression?

Is this correct and natural?

My granny is 90 but she's as fit as a horse.

 

[Rover_KE]

It's non-standard.

Traditional similes are as strong as a horse and as fit as a flea.

 

[White Hat]

Thanks to this thread, I've just learnt a new idiom - fit as a fiddle. Here is an example: Mary’s grandma is as fit as a fiddle. She still goes ballroom dancing every week and she’s almost 80 years old.

 

[5jj]

Well, you did not learn that one from this thread.

 

[Tdol]

You could add fighting fit to your list.

 

[alpacinou]

You could add fighting fit to your list.

Are these okay?

1. My granny is 90 but she's still fighting fit.

2. Gary seemed fine the last time I saw him; fighting fit. I can't believe he had a stroke.

 

[Tarheel]

Are these okay?

1. My granny is 90 but she's still fighting fit.

2. Gary seemed fine the last time I saw him; fighting fit. I can't believe he had had a stroke.