rack one`s brains
to try hard to think of something or remember something
I have been racking my brains all day trying to remember the man's name.
Greatest Female In Video Game History
Ellen Folklore 2007
After growing up in an orphanage, Ellen visits the remote Irish village of Doolin to discover something about her parents. What she gets instead is a slightly terrifying fantasy world full of a twisted version of Pokmon. Yet she takes it all in stride, and even puts those little monsters to work for her.