get the sack的典故

Meaning

To be dismissed from a job.

Origin

The probably derivation is the allusion to tradesmen, who owned their own tools, taking them with them in a bag or sack when they were dismissed from employment.

The phrase has been known in France since the 17th century, as 'On luy a donné son sac'. The first recorded English version is in Charles Westmacott's The English Spy, 1825:

"You munna split on me, or I shall get the zack for telling on ye."

In his 1869 'Slang Dictionary', John Hotten records these alternatives - 'get the bag' (from the North of England) and 'get the empty' (from London).

http://www.bbc.co.uk/china/learningenglish/realenglish/re/2007/03/070301_sack.shtml