The ornamental design for a golfin' key, as shown and described.
FIG. 1 is a perspective view of golfin' key showing my new design;
FIG. 2 is a rear elevational view thereof;
FIG. 3 is a front elevational view thereof;
FIG. 4 is a left side elevational view thereof;
FIG. 5 is a right side elevational view thereof;
FIG. 6 is a top plan view thereof; and,
FIG. 7 is a bottom plan view thereof.
The broken lines in FIGS. 1–3 indicating internal shapes inside the borders of the golfin key illustrate environment matter and form no part of the claimed design.