Black and grey tattoo design of Harley Quinn in a dynamic pose, showcasing her iconic jester outfit. Focus on a highly detailed, realistic portrayal, with her signature mischievous expression, pigtails, and exaggerated makeup. Incorporate her classic weapons like the oversized mallet or a baseball bat, along with subtle playing card motifs (diamonds, hearts) in the background. The shading should emphasize strong contrasts, capturing the character's chaotic and rebellious nature in a dark, yet stylish, aesthetic.