glutton for punishment
One who persists in an effort in spite of harmful or unpleasant results.
I should have quit this job long ago, but I guess I'm just a glutton for punishment.
adj
Gluttonous; greedy; gormandizing.
A glutton monastery in former ages makes a hungry ministry in our days.
So, so, thou common dog, didst thou disgorge Thy glutton bosom of the royal Richard?
noun
One who eats voraciously, obsessively, or to excess; a gormandizer.
Such a glutton would eat until his belly hurts.
One who consumes anything voraciously, obsessively, or to excess.
"Gluttons in murder, wanton to destroy."
"A good few indeed, my man," replied the captain. "Yes, you may make away with a deal of money and be neither drunkard nor glutton."
The wolverine, Gulo gulo.
[A] civil establishment […] is the animal called a glutton, which falling from a tree (in which it generally conceals itself) upon some noble animal, immediately begins to tear it, and suck its blood […].
A giant petrel.
verb
To glut; to satisfy (especially an appetite) by filling to capacity.
Glutton'd at last, return at home to pine.
In some cities their [local branches] have become gluttoned with success, and in their misguided overzealous ambition they are 'killing the goose that lays the golden egg.'
To glut; to eat voraciously.
Whereon in Egypt gluttoning they fed.
Thus do I pine and surfeit day by day, / Or gluttoning on all, or all away.