kick over the traces

kick over the traces idiom
Break loose from restraint, misbehave. For example, There's always one child who'll kick over the traces as soon as the bell rings. This metaphoric expression alludes to the straps attaching a horse to a vehicle, which the animal sometimes gets a leg over in order to kick more freely and thereby refuse to move forward. [Mid-1800s]

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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