The ornamental design for an inflatabledriftboat, as shown and described.
FIG. 1 is a front perspective view of an inflatable drift boat.
FIG. 2 is a right side view of the inflatable drift boat of FIG. 1; the opposite side being a mirror image thereof.
FIG. 3 is a front view of the inflatable drift boat of FIG. 1.
FIG. 4 is a back view of the inflatable drift boat of FIG. 1.
FIG. 5 is a top view of the inflatable drift boat of FIG. 1.
FIG. 6 is a bottom view of the inflatable drift boat of FIG. 1; and,
FIG. 7 is a rear perspective view of the inflatable drift boat of FIG. 1.
The broken lines illustrate portions of the article that form no part of the claimed design. The broken lines in FIG. 7 have been removed for clarity of disclosure.