The ornamental design for a choppingblock, as shown and described.
FIG. 1 is a perspective view of a chopping block according to our new design;
FIG. 2 is a top view of the chopping block shown in FIG. 1;
FIG. 3 is a bottom view of the chopping block shown in FIG. 1;
FIG. 4 is a front view of the chopping block shown in FIG. 1;
FIG. 5 is a rear view of the chopping block shown in FIG. 1;
FIG. 6 is a side view of the chopping block shown in FIG. 1, where the opposite side is a mirror image;
FIG. 7 is a further perspective view of the chopping block shown in FIG. 1 with a knife shown in phantom;
FIG. 8 is a further perspective view of the chopping block shown in FIG. 1 with a knife shown in phantom that fits in a slot in the chopping block; and,
FIG. 9 is a further front view of the chopping block shown in FIG. 1 with a knife shown in phantom inserted in a slot in the chopping block.
The broken lines depicted in the figure(s) of various components of the chopping block are for illustrative purposes only and form no part of the claimed design.