The ornamental design for a trinket for gifting or personal adornment, as shown and described.
FIG. 1 is a front elevational view of a trinket for gifting or personal adornment, showing my new design;
FIG. 2 is a back view thereof;
FIG. 3 is a side view thereof; and
FIG. 4 is a back perspective view thereof; and,
FIG. 5 is a front perspective view thereof.
The broken lines in the drawings, including all text, illustrate portions of the trinket for gifting or personal adornment, and form no part of the claimed design.