ichidan verb, transitive verb
Used for inventing a false story, excuse, or accusation. Often carries a negative nuance of deliberate deception.
彼はアリバイをでっち上げた。
He fabricated an alibi.
その記事は完全にでっち上げられた話
That article is a completely made-up story.
ichidan verb, transitive verb
cobble together; throw together
Used for hastily or carelessly putting something together, often with a sense of improvisation or poor quality.
締め切りに間に合わせるために、急いでレポートをでっち上げた。
I cobbled together a report in a hurry to meet the deadline.