rack brain

rack one's brain(s)

Fig. to try very hard to think of something. I racked my brains all afternoon, but couldn't remember where I put the book. Don't waste any more time racking your brain. Go borrow the book from the library.

rack your brain/brains

to think very hard, usually in order to remember something or to find a solution to a problem I've been racking my brains but I still can't remember who wrote that play.

See go to rack and ruin

rack (one's) brain

Informal

To think long and hard: I racked my brain for hours trying to recall her name.

Common Names:

Name	Pronounced	Usage
Kerr	-	Scottish, English (Rare)
Tom	[tɔm]
Liisu	LEE:-soo	Estonian
Julia	['dʒu:ljə]
Sa'adat	-	Arabic
Jay	[dʒei]