From Longman Dictionary of Contemporary Englishthe sackthe sackBritish English informalBECLEAVE A JOB OR ORGANIZATION when someone is dismissed from their job They’ve never actually given anyone the sack. He got the sack for stealing. She claimed she’d been threatened with the sack. → sack
Examples from the Corpusgot the sack• He was the television critic who shortly afterwards unfortunately wrote up a programme which had been cancelled, and got the sack.• Basil got the sack and next we heard Basil was trying to capture Rommel with Lord Lovatt's son.• With some pros you could have got the sack on the spot.• By then, tens of thousands more workers will have got the Sack and Sterling will have plunged even lower in value.• They checked with the firm and they said they didn't repair it, so he got the sack.• He'd never thought how she got the sacks out of her car.• The Tanners lived next door ter the stables till Will Tanner got the sack.