- a shirt made of haircloth worn next to the skin as a penance
- a secret trouble or affliction
WordReference Random House Unabridged Dictionary of American English © 2016
- Religiona garment of coarse haircloth, worn next to the skin as a penance by ascetics and penitents.
- self-imposed punishment, suffering, sacrifice, or penance.
- compare hair 1350–1400