According To Wikipedia:
To “bite the bullet” is to endure a painful or otherwise unpleasant situation that is seen as unavoidable. The phrase was first recorded by Rudyard Kipling in his 1891 novel The Light that Failed. It is often stated that it is derived historically from the practice of having a patient clench a bullet in his or her teeth as a way to cope with the extreme pain of a surgical procedure without anesthetic.
How many of us can describe a situation in which we had to make a decision, make an announcement, face our fears, or accept the inevitable? All of you should have nodded your head; spoke out loud, or even raised your hands because you admit whole-heartedly to the question posed. Today I had some conversations with some people who are really close to me and this term came to mind. You know sometimes we hold on to things for so long, knowing that we cannot escape them, knowing that one day they will catch up to us. Sometimes we endure things that shouldn’t be endured, and for one reason or another, we continue to endure until the weight is too heavy. Then there are those times where life throws a curve ball and a series of unavoidable events occur. However it may be, the most important word is this, unavoidable. You can’t run forever, you can’t take too much, and some things you just can’t do anything about. So you have to bite the bullet.
Biting the bullet doesn’t have to be a bad thing either. It actually can free you in some cases. A bad habit, an abusive relationship, and secret you’ve kept for years. Biting the bullet and doing what you need to do can liberate you and free you from a situation that would otherwise hurt you.
Whatever your situation, that is if you have a situation. Or maybe you know someone who is in a situation in which they need to go ahead and bite the bullet and get it over with. Help yourself or help someone you love move on with his or her life and do what is best for them no matter how hard making this decision, making the announcement, or realize the truth. Avoiding a serious situation will always turn out bad. And for that I commend those of you who have bitten the bullet for your own good. And that includes my brother.