The ornamental design for a meshfabriccover for a man's brief, as shown and described.
FIG. 1 is a perspective view of a mesh fabric cover for a man's brief;
FIG. 2 is front view of a mesh fabric cover for a man's brief;
FIG. 3 is a rear view thereof;
FIG. 4 is a right side view thereof;
FIG. 5 is a left side view thereof;
FIG. 6 is a top plan view of a mesh fabric cover for a man's brief; and,
FIG. 7 is a bottom view thereof.
The evenly spaced broken lines shown in the drawings depict portions of the man's brief that form no part of the claimed design. The dash-dot broken lines in the drawings depict the boundaries of the claim and form no part of the claimed design.