Related Clues:

• Irregular
• Not uniform
• Erratic
• Inconsistent
• Uneven
• Uneven in quality
• Poor, as coverage
• Hit-or-miss
• Uneven, as a performance
• Intermittent
• Lacking consistency
• Irregular in quality
• Pimply
• On-again, off-again
• Pimply or covered with dots