FIG. 1 is a perspective view of an upward discharge shower waste device, from the top front left and showing our new design; FIG. 2 is a front elevational view thereof; FIG. 3 is a right-side elevational view thereof; FIG. 4 is a left-side elevational view thereof; FIG. 5 is a rear elevational view; FIG. 6 is a plan view from above thereof; FIG. 7 is a plan view from below thereof; and, FIG. 8 is a perspective view from below rear right thereof.