At a pinch

Pro Tip 1/3

Emergency Substitute

Use it when something else can work temporarily when the usual option isn't available.

I forgot my textbook but I can use his notes at a pinch.

Pro Tip 2/3

Slight Discomfort

It implies the alternative is acceptable, though not ideal or may come with minor issues.

We can sleep on the floor at a pinch if there are no beds.

Pro Tip 3/3

Not Preference

Emphasizes that the option is a backup, not something you would normally choose.

He's not my favorite actor, but he'll do at a pinch.