I claim the ornamental design for a ultrasound body slimming device, as shown and described.
FIG. 1 is a Perspective view of a ultrasound body slimming device showing my new design;
FIG. 2 is a Front view thereof;
FIG. 3 is a Back view thereof;
FIG. 4 is a Right-side view thereof;
FIG. 5 is a Left-side view thereof;
FIG. 6 is a Top view thereof;
FIG. 7 is a Bottom view thereof; and,
FIG. 8 is a Bottom view without cover thereof.
The broken lines in FIGS. 2-3 and 7-8 are included for the purpose of illustrating a portion of the ultrasound body slimming device that forms no part of the claimed design.