1. To die, break down, or become defunct. We all have to bite the biscuit someday. I drove that truck everywhere for 25 years, but it finally bit the biscuit yesterday.

2. To face up to, undertake, or confront some unpleasant or risky situation, action, or responsibility. You were the only person here when the television broke, so you might as well bite the biscuit and tell me the truth. I guess we'd better bite the biscuit and get this over with.