hold the fort definition
hold the fort
Assume responsibility, especially in another's absence; also, maintain a secure position. For example, Harry did a good job of holding the fort until his boss recovered, or Can you hold the fort in the kitchen? This expression has been traced to an order given by General William Tecumseh Sherman in 1864, which was repeated as "Hold the fort [against the enemy at Allatoona] at all costs, for I am coming."