The ornamental design for a tikitorchholder, as shown and described.
FIG. 1 is a perspective view of a tiki torch holder in accordance with the new design, with broken lines showing an example of a torch and support, but forming not part of invention herein;
FIG. 2 is a perspective view of the tiki torch holder of FIG. 1 without broken lines;
FIG. 3 is a right side elevational view thereof, whereby the opposing left side is a mirror image thereof;