(as) fit as a flea

(as) fit as a flea

In good health. Yes, I did have surgery a few months ago, but I'm as fit as a flea now. I just saw Eric recently, and he's as fit as a flea.
See also: fit, flea

fit as a flea

in very good health.
The phrase makes reference to a flea's agility.
See also: fit, flea