This idiom or expression has to do with:

Getting fired.
Being dismissed from a job.

A. What happened to Jenny?
B. They found her sleeping on the job!! She was let go this morning.

This idiom or expression has to do with:

Getting fired.
Being dismissed from a job.

Due to a bad economy, a lot of our employees are going to get pink slips this year. We’re sorry to do this, but there’s nothing else that we can do.

“Pink slip” or “Title” also refers to the paperwork that establishes the ownership of a vehicle.

Also see:
Getting the boot.

This idiom or expression has to do with:

Getting fired.
Being dismissed from a job.

A. Why do you look so upset? Have you gotten your walking papers?
B. Yes, they gave me my walking papers this morning!!

This idiom or expression has to do with:

Getting fired.
Being dismissed from a job.

Also:
Getting booted out of a job.