We claim the ornamental design for a slush pushing tool, as shown and described.
FIG. 1 is a perspective view of a slush pushing tool, showing our new design in a straight configuration;
FIG. 2 is a bottom plan view of FIG. 1;
FIG. 3 is a top plan view of FIG. 1;
FIG. 4 is a left-side elevational view thereof;
FIG. 5 is a front elevational view thereof;
FIG. 6 is a right-side elevational view thereof;
FIG. 7 is a rear elevational view thereof;
FIG. 8 is a perspective view thereof, illustrated in a pivoted configuration; and,
FIG. 9 is a left-side elevational view of FIG. 8.
The broken lines showing a sheet of ice with an aperture therethrough and ice slush in FIGS. 1 and 8 depict environmental matter and form no part of the claimed design.