a last resort

last resort

The only remaining option that may help one or be of any use after all other options have been exhausted. I didn't really want to ask Mr. Stadler to write my college recommendation, but he's my last resort at this point.
See also: last, resort
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.

(as) a last reˈsort

a thing you decide to do when everything else has failed: Nobody wanted to lend me the money. As a last resort I asked my brother-in-law, and luckily he was able to help me.
See also: last, resort
Farlex Partner Idioms Dictionary © Farlex 2017
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References in periodicals archive ?
Prevent the dreaded "urn's" and "er's" by jotting down a few things you can say as a last resort. Remember, though, it's way better to go with the flow and launch into a related story: "That reminds me..." If things are still lagging, just say you have to run.