from The American Heritage® Dictionary of the English Language, 4th Edition
- adj. Fraudulently devised; fabricated: trumped-up criminal charges.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- adj. Faked, fabricated or falsely manufactured. Usually in the phrase trumped-up charges referring to legal accusation made for illegitimate reasons.
from The Century Dictionary and Cyclopedia
- Fabricated out of nothing or deceitfully; forged; false; worthless.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- adj. concocted with intent to deceive
From the past participle form of the phrasal verb to trump up (Wiktionary)