1. (a.) Not careful or promptly fulfilling a duty; negligent; careless\; tardy; behindhand; lagging; slack; hence, lacking earnestness or activity; languid; slow.

2. (n.) The act of being remiss; inefficiency; failure.

Micawberish backward behindhand bone-lazy cadging careless culpably negligent dallying delaying delinquent derelict dilatory dillydallying disregardful do-nothing doless dronish drony easy easygoing ergophobic faineant foot-dragging forgetful good-for-nothing heedless impotent imprecise inadvertent inattentive indifferent indolent lackadaisical laggard lagging laissez-faire lax lazy lenient lingering loitering loose neglectful neglecting negligent nonaggressive noninterfering nonrestrictive off-guard overindulgent overly permissive overpermissive parasitic permissive procrastinating procrastinative procrastinatory regardless relaxed scamping scrounging shiftless shuffling skimping slack slighting slipshod sloppy slothful slow sluggish slurring soft sponging thoughtless uncircumspect unenterprising unguarded unheeding unmindful unrestrained unrigorous unthinking unwary unwatchful weak work-shy