don't jump the gun

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don't jump the gun

Do not start or undertake something before it is permissible, appropriate, or advisable. The phrase alludes to starting to run in a foot race before the starting gun goes off. Henry, please don't jump the gun and send the proofs to the printer before the boss approves them. Don't jump the gun and announce our engagement before everyone gets here, OK?
See also: gun, jump
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.
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