This one-handed ASL sign is produced optionally shaking the head “no”:
Posture the dominant hand in the “bent B” handshape at the dominant side of the forehead, near the temple.
Twist the hand away from the head in a manner that suggests throwing away.
Posture the dominant hand in the “bent B” handshape several inches from the dominant side of the forehead, dominant palm facing toward the dominant side.