Wiktionary
vb. (context idiomatic ambitransitive English) to collect (leaves etc.) into a pile by using a rake
WordNet
v. bring to light; "He raked up the misdeeds of his predecessor"
Usage examples of "rake up".
In front of him, on the Sunday-set table, was a veal roast that would have fed enough men to rake up all six acres of leaves on the Torrens estate in half an hour.
Once it's out in the open that we're pitching for Corinium, Tony Baddingham is going to do everything to discredit us and rake up dirt about all of us.
And I decided to throw it the fuck down the tubes, too, and bend Valens as far over the desk as I could, and give my little terrorist boyfriend every bit of dirt I could rake up on the program.
I polished what turned out to be a stone that could have passed for a finger bone, and she pointed the wooden butt of her rake up at an empty overcast sky.
And pray let him know that Pearce will rake up anything and everything that may be to his disadvantage, anything that may lower him and through him his friends and connexions, and that the prosecution will have all the resources at the ministry's command to help in the raking.
You've become high an' mighty here these past few years, but if you want to rake up the past, Dutch, I can tell some stories.
For when he was pressed to make good his charge and must rake up some excuse for it somehow, by a piece of luck he thinks of a morning when he saw Betty Harlowe in the street of Gambetta near to the shop of Jean Cladel.