Excess consumption by an auxiliary member of the leisure class. This is referenced in Thorstein Veblen's "The Theory of The Leisure Class". His most prominent example is described as a wife of a member of the leisure class.
Through vicarious leisure, she enjoyed the fine accoutrements provided by the vast wealth of her husband.
Vicarigasm is an orgasm achieved purely through the empathetic enjoyment of of giving pleasure to one's partner, or watching/experiencing their orgasm, with no direct physical stimulation of one's own genitals.
Related to compersion.
Jack's moans of pleasure as she gave him head, drove her wild with passion. When he climaxed, her body convulsed in an uncontrollable vicarigasm.