The ornamental design for a toiletbowl, as shown and described.
FIG. 1 is a rear top left-side perspective view of the disclosed toilet bowl in an exemplary environment;
FIG. 2 is a front top left-side perspective view thereof;
FIG. 3 is a rear top perspective view thereof;
FIG. 4 is a top view thereof;
FIG. 5 is a rear top right-side perspective view thereof; and,
FIG. 6 is a front top right-side perspective view thereof.
The broken lines shown in FIGS. 1-6 are for illustration purposes only, showing environmental subject matter (as distinguished from the claimed serpentine, ridge-like internal front portion of the toilet bowl, shown in solid lines), and form no part of the claimed design.