The ornamental design for a hairclipper, as shown and described.
FIG. 1 is a perspective view showing a hair clipper design;
FIG. 2 is a front elevational view thereof;
FIG. 3 is a rear elevational view thereof;
FIG. 4 is a right side elevational view thereof;
FIG. 5 is a left side elevational view thereof;
FIG. 6 is a top plan view thereof; and,
FIG. 7 is a bottom plan view thereof.
The portions of the hair clipper shown in broken lines are included for the purpose of illustrating unclaimed portions of the hair clipper and form no part of the claimed design.