Downsizing

'Downsizing' means moving from a larger place into a smaller one. It can refer to a physical space, like a large house to a condo, or it can refer to what a company or organization can do. In the case of the latter, downsizing is actually a euphemism for getting fired.

Examples:
-What prompted your move?
-Now that the kids are out of college, it was time to downsize. We just didn't need that much space anymore.

-So, I heard your department is downsizing.
-Yeah, 10 people are being let go.

Dead-end job

A 'dead-end job' is one where there is no opportunity for advancement. It leads to nowhere, like a dead-end street.

Example:
-I'm afraid I may have to get a job at a fast-food restaurant.
-Well, it's pretty much a dead-end job, but hopefully it'll help you pay some bills!