thank-you-ma'am

noun
\ˈthaŋk-yu̇-ˌmam, -(y)ē-\

Definition of thank-you-ma'am 

: a bump or depression in a road especially : a ridge or hollow made across a road on a hillside to cause water to run off

First Known Use of thank-you-ma'am

1849, in the meaning defined above

History and Etymology for thank-you-ma'am

probably from its causing a nodding of the head

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Dictionary Entries near thank-you-ma'am

thanks to

thankworthy

thank-you

thank-you-ma'am

Thant

thapsia

thapsic acid

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The first known use of thank-you-ma'am was in 1849

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exaggeratedly or childishly emotional

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