The ornamental design for a carrierbag, as shown and described herein.
FIG. 1 is a side view of a carrier bag of my new design;
FIG. 2 is an enlarged three dimensional view of a portion thereof;
FIG. 3 is an three dimensional view of FIG. 1, this particular view showing a carrier bag that has been at least partially opened and is lying on its side; and,
FIG. 4 is a three dimensional view thereof, this particular view showing a carrier bag that is upright and has been at least partially opened.
The broken lines consisting of a dot and dash represent the bounds of the claim and all other broken lines consisting solely of dashes depict environmental subject matter. None of the broken lines form a part of the claimed design.