n. loving comments; pleasant remarks between lovers. : They are out on the porch swing whispering sweet nothings in each other's ears.
Dictionary of American Slang and Colloquial Expressions by Richard A. Spears.Fourth Edition. Copyright 2007. Published by McGraw Hill.
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Idioms & Phrases
sweet nothings
Endearments, often whispered, between lovers. For example, They sat in a corner all evening, whispering sweet nothings. [c. 1900] Also see sweet talk.