rack brains

rack your brains

also rack your brain

to try very hard to remember or think of something She racked her brains for a subject they could discuss without an argument.

/brain

To try hard to remember or think of something.

Name	Pronounced	Usage
CÁNdida	KAHN-dhee-dhah	Spanish
Emmaline	EM-ə-leen	English
Aslan	-	Turkish, Kazakh, Azerbaijani, Chechen, Ingush
JevgeŅIjs	-	Latvian
Sean	[ʃɔ:n]
Benjy	BEN-jee	English