now or never, it's

now or never, it's idiom
It must be done now or not at all, as in If you plan to state your case to the boss, it's now or never. This phrase was first recorded in 1560.

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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