give someone up for lost

give (someone or something) up for lost

To stop pursuing or searching for someone or something because it seems like a futile task. I haven't been able to find that watch for weeks, so I've given it up for lost at this point.
See also: give, lost, up
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.

give someone up for lost

stop expecting that a missing person will be found alive.
See also: give, lost, someone, up
Farlex Partner Idioms Dictionary © Farlex 2017
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