trump up sth/trump sth up
phrasal verb with trump verb [ T ] uk/trʌmp/ us
to give or use false information so that someone will be accused of doing something wrong and punished:
The accusation, she said, was trumped up in order to get rid of her.
The whole story was trumped up by our competitors.
trumped up
(also trumped-up)
She maintains that the case is based on trumped-up charges.