1. Of an employer, to say to someone (an employee) that they can no longer work for you, often because their work is not good enough. English = sack, fire, dismiss.
2. Of an employee, to be told by your boss (your employer) that you can no longer work for them. English = (be) sacked, get sacked, (be) fired, get fired. Idiomatic English = get the sack, (be) given the sack, get the push.