Quitter or quitter means someone who gives up too easily; who doesn't finish what he or she starts --
He is still struggling with those math problems; at least he isn't a quitter.
Only a quitter would give up so soon; you've only been working an hour.
Quittor or quittor means a degenerative disease of an animal's hoof--
The vet is treating that horse for quittor; no one should ride him.
A bad case of quittor left him lame, so we put him out to pasture.
Now that you know that, you can say --
"This horse is no quitter; we thought the quittor would hobble him, but he finished the race."
Note -- "quit or" ( two words ) means to stop, resign, or give up ( quit ) offered as an alternative ( or ) --
Shall we quit or finish the job?
