be hoist by/with (your) own petard

formal

if you are hoist by your own petard, something that you did in order to bring you advantages or to harm someone else is now causing serious problems for you.

The government, who have made such a point of criticizing the opposition's morals now find themselves hoist by their own petard as yet another minister is revealed as having an illicit affair.

• 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
• put yourself in place