The ornamental design for a trikebody, as shown and described.
FIG. 1 is a left side view of the trike body.
FIG. 2 is a left front view of the trike body.
FIG. 3 is a right side view of the trike body.
FIG. 4 is a rear view of the trike body.
FIG. 5 is a front elevation view of the trike body; and,
FIG. 6 is a rear elevation view of the trike body.
The broken lines immediately adjacent the shaded areas represent boundaries of the claimed design and form no part thereof, while the other broken lines show environmental elements which form no part of the claimed design.