To fabricate or make up (a story, evidence, charge); to concoct something false, often with intent to deceive.
彼は証拠をでっち上げられて不当に逮捕された。
He was falsely arrested after evidence was fabricated against him.
雑誌が根拠のないゴシップをでっち上げた。
The magazine manufactured baseless gossip.
あの容疑者は罪をでっち上げられた可能性がある。
That suspect may have had a crime trumped up against him.
To cobble together or assemble in a slapdash way; to improvise or put something together hastily.
急に頼まれたので、彼は資料をでっち上げて会議に出た。
Since he was asked suddenly, he cobbled together some materials and attended the meeting.
その論文は根拠薄弱で、読み手にはでっち上げた印象を与えた。
That paper was weakly supported and gave readers the impression it had been slapped together.
彼はインタビューで即席の話をでっち上げた。
He made up an impromptu story during the interview.