The ornamental design for a diaperbag, as shown and described.
FIG. 1 is a front perspective view of a diaper bag showing my new design;
FIG. 2 is a front view of the diaper bag shown in FIG. 1;
FIG. 3 is a rear view of the diaper bag shown in FIG. 1;
FIG. 4 is a left side view of the diaper bag shown in FIG. 1;
FIG. 5 is a right side view of the diaper bag shown in FIG. 1;
FIG. 6 is a top view of the diaper bag shown in FIG. 1; and,
FIG. 7 is a bottom view of the diaper bag shown in FIG. 1.
The broken lines showing a strap, handle, zippers, zipper pulls and zipper tracks are for the purposes of illustrating environment and form no part of the claimed design.