If you shoot yourself in the foot, you do or say something stupid which can cause serious problems for you.
In fact, a bad behavior like blaming people around, annoying them by talking too much about yourself or trying to be smarter than them can spoil a situation for yourself.
Let’s see some examples :
– She shot herself in the foot by flirting her boss.
– Why does he always shoot himself in the foot by acting like that ?
– The coach shot himself in the foot by saying that all players didn’t play like it should.