The ornamental design for a weightlifting glove, as shown and described.
FIG. 1: A back elevational view of a weightlifting glove showing my new design;
FIG. 2: A front elevational view thereof; and,
FIG. 3: A front elevational view shown on an enlarged scale showing the two Velcro strips adhering, allowing free access for the fingers. The broken line showing of wrist and fingers is for illustrative purposes only and forms no part of the claimed design.