1. shedding or casting off dead tissue, skin, or other material from the surface of something
Usage: medical; biological
2. avoiding work or responsibility; being lazy or negligent
Usage: informal

Examples

• The wound was sluffing dead tissue as it healed.
• The snake was sluffing its old skin.
• He was sluffing off his homework assignments.
• The student got in trouble for sluffing class.
• The damaged cells were sluffing away from the surface.
• She was sluffing her responsibilities at work.