Toothbrush

FIG. 1 is a front perspective view of a toothbrush, according to an embodiment of our new design;

FIG. 2 is a rear perspective view thereof;

FIG. 3 is a front view thereof;

FIG. 4 is a rear view thereof;

FIG. 5 is a left side view thereof;

FIG. 6 is a right side view thereof;

FIG. 7 is an enlarged top view thereof; and,

FIG. 8 is an enlarged bottom view thereof.

The dashed broken lines illustrate portions of the toothbrush that form no part of the claimed design. The dot-dash broken lines define the bounds of the claimed design and form no part thereof.