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smarty-pants

noun, plural in form but singular in construction \ ˈsmär-tē-ˌpan(t)s \

Definition of smarty-pants

: smart aleck
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smarty-pants

adjective

First Known Use of smarty-pants

1935

in the meaning defined above

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SMARTY-PANTS Defined for English Language Learners

smarty-pants

noun

Definition of smarty-pants for English Language Learners

  • : a person who talks and behaves like someone who knows everything

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