you can't get blood out of a turnip

you can't get blood out of a turnip

It's pointless trying to achieve something that is already impossible. Good luck getting a group of toddlers to sit still—you can't get blood out of a turnip, you know. A: "Why don't you ask your dad for the money?" B: "Because you can't get blood out of a turnip."
See also: blood, get, of, out, turnip
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.
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