The ornamental design for a loungechair, as shown and described.
FIG. 1 is a perspective view of a lounge chair embodying my design;
FIG. 2 is a front view of the lounge chair;
FIG. 3 is a rear view of the lounge chair;
FIG. 4 is a top view of the lounge chair;
FIG. 5 is a bottom view of the lounge chair;
FIG. 6 is a right side view of the lounge chair; and
FIG. 7 is a left side view of the lounge chair; and,
FIG. 8 is a perspective view of the lounge chair, showing a seat cushion, a back cushion and a pillow placed on the chair.
The broken lines in FIG. 1 illustrate the environment in which the claimed design is used, namely showing a pillow a seat cushion and a back cushion. None of the broken-line matter forms a part of the claimed design.