Toothbrush

FIG. 1 is a front, bottom, right side perspective view of a toothbrush showing my new design;

FIG. 2 is a right side elevational view thereof;

FIG. 3 is a front plan view thereof;

FIG. 4 is a back plan view thereof; and,

FIG. 5 is a rear, bottom, left side perspective view thereof.

The broken lines are included for the purpose of illustrating portions of the toothbrush that are illustrative and that form, no part of the claimed design. The dash-dot-dash line indicates the boundary between claimed and unclaimed subject matter and forms no part of the claimed design.