To "bite the bullet" means to endure something painful, difficult, or unpleasant with stoicism — accepting it rather than avoiding or complaining about it. You might bite the bullet when paying a large unexpected bill, having a difficult conversation, or pushing through an injury.
The most widely accepted origin links the phrase to military surgery in the 18th and 19th centuries. Before anaesthesia became widely available, soldiers requiring amputations or other major procedures had to endure them conscious. Surgeons would give a patient a lead bullet — or sometimes a leather strap or piece of wood — to bite down on, both to help them tolerate the pain and to prevent them from biting their own tongue.
The earliest known printed use appears in Rudyard Kipling's 1891 novel The Light That Failed: "Bite on the bullet, old man, and don't let them think you're afraid." Kipling used it figuratively, which suggests the phrase was already understood in its modern sense by the late 19th century.
Historians debate this. Some point out that no clear documentary evidence places bullets specifically in patients' mouths during pre-anaesthetic surgery — leather straps and wooden blocks were more common. Others suggest the image of biting metal during pain was simply a vivid metaphor that caught on. Whatever the precise origin, the phrase was in common use by the 1890s and has remained in the language ever since.
Comparable phrases include "grin and bear it," "take it on the chin," and "tough it out." All carry the same sense of enduring difficulty without complaint, accepting something unavoidable rather than fighting it.
It is widely believed to have military or surgical origins from the pre-anaesthetic era, when soldiers bit on bullets or leather during painful procedures. The earliest confirmed literary use is Rudyard Kipling's 1891 novel The Light That Failed.
In business contexts, biting the bullet means accepting a costly or difficult decision that cannot be avoided — such as taking a financial loss, making a difficult hire, or implementing an unpopular change.