The ornamental design for an adultnoveltystickshiftknob, as shown and described.
FIG. 1 is a perspective view of an adult novelty stick shift knob;
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 broken lines shown in FIG. 7 are for the purpose of illustrating portions of the adult novelty stick shift knob which form no part of the claimed design. The broken lines shown in FIG. 1 are for the purpose of showing environmental structure which form no part of the claimed design.