Laziness is the pull to postpone, drift and avoid effort even when we know what needs doing. It rarely feels like laziness from the inside. It shows up as one more scroll, one more nap, a task pushed to tomorrow. Sometimes it is simple tiredness, but often it grows from habit, low motivation or a vague sense that effort will not matter anyway.
The Gita names this heaviness tamas, the quality of inertia and darkness. Gita 14.8 says tamas is born of ignorance and binds through heedlessness, laziness and excessive sleep, while Gita 14.13 lists dullness, negligence and lack of purposeful action among its signs. Gita 18.28 describes a doer in this mode as unsteady, slothful and a procrastinator. Gita 3.8 answers plainly that action is better than idleness, and that even maintaining life is impossible without it.
The Gita does not prize busyness for its own sake. Gita 3.4 says freedom is not won by merely abstaining from action, so withdrawing from duty is not the same as spirituality. Gita 3.22 shows even the Lord acting though He has nothing to gain, and Gita 4.28 values service, discipline and study together. If you feel stuck, take one small disciplined step, restore regular routines and seek wholesome company.