The ornamental design for a fishingrod sling, as shown.
FIG. 1 is a perspective view of a fishing rod sling according to my new design securing an end of a fishing pole to the wrist of its user, the phantom showing of the fishing rod and wrist of the user forming no part of the claimed design;
FIG. 2 is a perspective view of a fishing rod sling according to my new design securing an end of another type of fishing pole to the wrist of its user, the phantom showing of the fishing rod and wrist of the user forming no part of the claimed design;
FIG. 3 is a perspective view of a fishing rod sling according to my new design;
FIG. 4 is a front elevational view of the fishing rod sling of FIG. 3;
FIG. 5 is a rear elevational view of the fishing rod sling of FIG. 3;
FIG. 6 is a right side elevational view of the fishing rod sling of FIG. 3;
FIG. 7 is a left side elevational view of the fishing rod sling of FIG. 3;
FIG. 8 is a top plan view of the fishing rod sling of FIG. 3; and,
FIG. 9 is a bottom plan view of the fishing rod sling of FIG. 3.