that is a deserter.

Of the nature of defection or desertion; inclined to defect. Obsolete. rare.

That fails in the performance of a duty or fulfilment of an obligation; (now chiefly) spec. that fails to meet financial commitments.

Guilty of dereliction of duty; unfaithful, delinquent (U.S.).

That has failed to fulfil a duty or obligation. Also: involving financial default.