the sack [S] mainly US informal › bed: It's late - I'm going to hit the sack (= go to bed). He came home and found Judy and Brad in the sack (= in bed) together.in the sack mainly US informal › If someone is good/bad in the sack, they are sexually skilled/not sexually skilled.
sack verb [T]
B2 mainly UK (US usually fire) to remove someone from a job, usually because they have done something wrong or badly, or sometimes as a way of saving the cost of employing them: They sacked her for being late. He got sacked from his last job.
the sack [S] UK › HR, WORKPLACE a situation in which you are told by your employer that you must leave your job, especially because you have done something wrong: get the sack If I don't do the job right, I'll get the sack.give sb the sack Her repeated unexplained absences led her manager to give her the sack. face the sackearn sb the sack The company's poor sales figures finally earned Miller the sack.