おりがみつき

おりがみつき【折り紙付き】

●折り紙付きの certified (as genuine); guaranteed; 〔皮肉に〕 notorious 《bigmouth》; arrant 《fool, thief》

・折り紙付きの品 an object [item, article] certified as genuine; an article accompanied by a certificate of genuineness

・折り紙付きの腕前 acknowledged skill [ability]

・あいつは折り紙付きの怠け者だ. He's a notorious layabout. | Everybody knows he's an idler.

●彼女の演説のうまさは折り紙付きだ. We (can) guarantee [vouch for] her skill at public speaking.

・彼の二枚舌は折り紙付きだね. He's a notorious liar [《口》 phon(e)y]. | He's notoriously tricky [deceitful].