The ornamental design for novelty conversation filter or similar article, as shown and described.
FIG. 1 is a front perspective view of a novelty conversation filter or
similar article showing my new design, the opposite side being a mirror
image thereof;
FIG. 2 is a top plan view thereof;
FIG. 3 is a bottom plan view thereof; and
FIG. 4 is a side view thereof, the opposite side being a mirror image of
the view shown in FIG. 4.