sell someone/yourself/something short

US /sel ˈsʌm.wʌn/jʊərˈself/ˈsʌm.θɪŋ ʃɔrt/
UK /sel ˈsʌm.wʌn/jʊərˈself/ˈsʌm.θɪŋ ʃɔrt/
"sell someone/yourself/something short" picture
1.

to underestimate or undervalue someone or something

:
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Don't sell yourself short; you have a lot of valuable skills.
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It would be a mistake to sell them short in this competition.
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short sellingthrow yourself at someonesellyourselfsell someone down the rivershortshorts