To regress; to slip backwards or revert to a previous, worse state. / To shirk responsibility; to renege on one's obligations or commitments.

A backward regression; a reverting back to a worse state.

Third-person singular simple present indicative form of backslide

plural of backslide

A recidivist; one who backslides, especially in a religious sense; an apostate.

plural of backslider

simple past tense and past participle of backslide

present participle of backslide

sliding back

An occasion on which one backslides, especially in a moral sense.