bite the bullet
Possibly from the reported practice of soldiers biting a bullet to avoid crying out in pain, usually during a medical procedure or punishment. (While this is given frequently as an etymology, this source suggests that the term derives instead from the practice of biting open paper cartridges.)
- (idiomatic) To endure a punishment or consequence with dignity or stoicism.
- (idiomatic) To accept a negative aspect of a situation in order to proceed.