a sweet tooth

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sweet tooth

A propensity and preference for eating sugary foods. If you're looking for a snack, go talk to Jenny—she has a real sweet tooth, so she probably keeps candy bars in her desk. Because I don't have much of a sweet tooth, I get more excited about entrees than desserts.
See also: sweet, tooth
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.

a sweet tooth

COMMON If you have a sweet tooth, you like eating things that taste of sugar. She has a sweet tooth for chocolate cake and cookies. For those without a sweet tooth, savoury snacks are also available.
See also: sweet, tooth
Collins COBUILD Idioms Dictionary, 3rd ed. © HarperCollins Publishers 2012

sweet tooth, (to have) a

A love for sugary foods. This seemingly modern expression goes back to the sixteenth century, although it did not always refer exclusively to carbohydrate goodies. “Thou hast . . . a sweet tooth in thy head, a liquorish appetite to delicate meats and intoxicating wines,” wrote Thomas Adams in a sermon of 1629.
See also: sweet
The Dictionary of Clichés by Christine Ammer Copyright © 2013 by Christine Ammer
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References in periodicals archive ?
``Bad dietary habits continue from childhood into adulthood so we all need to wake up to the danger of indulging a sweet tooth which is contributing to the rise in obesity as well as being a key culprit in tooth decay.
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A story about a dentist with a sweet tooth, giant royal cockroaches, and a band of hungry competitive eaters.
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