heart in one's mouth, have one's
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Be extremely frightened or anxious, as in When the plane was about to take off, my heart was in my mouth. This usage alludes to the heart beating so violently that it appears to leap upward. [Mid-1500s]
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Words nearby heart in one's mouth, have one's
heart-healthy, hearthside, hearthstone, heartily, heart in it, have one's, heart in one's mouth, have one's, heart in the right place, have one's, heart is set on, heartland, heartless, heart-lung machine
The American Heritage® Idioms Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.