one for the road

one for the road idiom
A final drink before leaving, as in Won't you have just one for the road? This term always alludes to an alcoholic drink and a practice that, if the person is going to drive away, is not only frowned on but in many places illegal. [First half of 1900s]

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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