牝牡驪黃

1. • a black stallion or possibly a yellow mare (idiom) don't judge by outward appearance

Character by character

• 牝(pìn)(of a bird, animal or plant) female
• 牡(mǔ)(of a bird, animal or plant) male
• 驪(lí)black horse
• 黃(huáng)surname Huang or Hwang