What does it mean?
Healthy? Suitable? Capable?
In my case, it means:
' Did u have another seizure?'

Suitable and capable are not definitions that apply.
No matter my ability, I may have a fit.

Can do with your cleverness
But not with your fits.

Stay home, live off welfare,
that's all I'm fit for.

Not fit for freedom,
I need a keeper,
I may have a fit.

Considering the fit of a noose...