noun
yak hair dyed red; red hair
Refers specifically to yak hair that has been dyed red, often used in traditional crafts or ornaments.
祭りの飾りに赤熊が使われている。
Red-dyed yak hair is used in the festival decorations.
noun
frizzled fake hair; curly fake hair
Used for artificial hair that is frizzled or curled, often in theatrical or decorative contexts.
歌舞伎の鬘には赤熊がよく使われる。
Frizzled fake hair is often used in kabuki wigs.
Compound of 赤 (red) and 熊 (bear), but here 熊 is used phonetically for くま, a term for hair or fur. The exact derivation is uncertain; the spelling is conventionally associated with red-dyed yak hair.