sell short

sell someone/something short

to not value someone or something as much as they deserve to be valued. I'm fed up with people selling this country short. 'Who'd employ me at my age?' 'Don't sell yourself short! You're intelligent and you've got loads of experience.' (often reflexive)

See also: sell, short

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sell someone/something short

to not appreciate the qualities of someone or something as much as they deserve. I think her presentation really sold Morocco short.

Usage notes: sometimes used in the form sell yourself short not have reasonable confidence in your abilities: She doesn't succeed in interviews because she always sells herself short.

See also: sell, short