1. An important weakness or flaw in someone who appears strong or invincible

Encyclopedia: Feet of clay

• foster-nurse
• foster-sister
• foster-son
• fosterage
• fostering
• fosterling
• fothergilla
• FOTS
• Foucault
• Foucault pendulum
• foul
• foul ball
• foul line
• foul out
• foul play
• foul shot
• foul-mouthed
• foul-smelling
• foul-spoken
• foul-up
• foul-weather gear
• foulard
• fouled
• foully
• foulmart