no can do

no can do idiom
It's impossible; I can't do this. For example, When Bill asked me to write a speech, I told him bluntly no can do. This colloquial phrase was first recorded in 1914.

The American Heritage® Dictionary of Idioms by Christine Ammer. Copyright © 2003, 1997 by The Christine Ammer 1992 Trust. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

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