to invite someone to argue, fight, or compete with you.

A price war could break out in the High Street after a leading supermarket threw down the gauntlet to its competitors.

• put your hand in your pocket
• put your hand on heart
• put your hand on your heart
• put your head above the parapet
• put your head down
• put your head on the block
• put your heads together
• put your heart and soul into
• put your heart and soul into doing something
• put your heart and soul into something
• put your heart into
• put your heart into something
• put your house in order
• put your life in hands
• put your life in someone's hands
• put your life on the line
• put your mind to it
• put your money on someone
• put your money on something
• put your money where mouth is
• put your money where your mouth is
• put your neck on the block
• put your neck on the line
• put your oar in
• put your own house in order