The ornamental design for a meattenderizer, as shown and described.
FIG. 1 is a top perspective view of a meat tenderizer showing my new
design;
FIG. 2 is a top perspective view thereof with the upper plate being in an
extended position, it being understood that the upper plate and lower
plate have the same serrated configuration;
FIG. 3 is a top plan view thereof;
FIG. 4 is a right side elevational view thereof, the left side elevational
view being a mirror image thereof; and,