dissipation

The act of dissipating or dispersing; a state of dispersion or separation; dispersion; waste.

A dissolute course of life, in which health, money, etc., are squandered in pursuit of pleasure; profuseness in immoral indulgence, as late hours, riotous living, etc.; dissoluteness.

A trifle which wastes time or distracts attention.

(physics) A loss of energy, usually as heat, from a dynamic system.