dig some dirt up

dig some dirt up

To uncover negative information about someone or something. Once I contact my usual sources at the tabloids, I should be able to dig some dirt up on that actress.
See also: dig, dirt, up

dig some dirt up (on someone)

Fig. to find out something bad about someone. If you don't stop trying to dig some dirt up on me, I'll get a lawyer and sue you. The citizens' group dug up some dirt on the mayor and used it against her at election time.
See also: dig, dirt, up