trump up, to devise deceitfully or dishonestly, as an accusation; fabricate: Try as they might, they were unable to trump up a convincing case against him.
"trumpet," c.1300, from O.Fr. trompe "long, tube-like musical wind instrument" (12c.), cognate with Prov. tromba, It. tromba, all probably from a Gmc. source (cf. O.H.G. trumpa and O.N. trumba "trumpet"), of imitative origin.
mod. heavily promoted; overly praised. : That movie was so trumped up. I expected to see something much better than it turned out to be.
Dictionary of American Slang and Colloquial Expressions by Richard A. Spears.Fourth Edition. Copyright 2007. Published by McGraw Hill.
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