Lacking self-restraint, especially having completely yielded to one's impulses.

self′-a·ban′don·ment n.
References in classic literature ?
He left the fire; he put the ax away softly in a corner; he sat down in his old place, deliberately self-abandoned to a frenzy of vindictive joy.
Tempted and friendless, self-abandoned to the evil impulse of the moment, this woman may have committed herself headlong to the act which she now vainly repents.
the wholesome restraint of discipline is but little known among this self-abandoned people.
Self-abandoned, relaxed, and effortless, I seemed to have laid me down in the dried-up bed of a great river; I heard a flood loosened in remote mountains, and felt the torrent come: to rise I had no will, to flee I had no strength.
Sometimes Christians seem far nearer to those animals than to Christ in his simple poverty, self-abandoned to God.